This was CNBC's live blog tracking developments on the Israel-Hamas conflict on Oct. 10. See here for the latest updates.

The Israeli Defense Force said the first plane carrying U.S. armaments has arrived in southern Israel. "Our common enemies know that the cooperation between our militaries is stronger than ever, " the IDF said.

The al-Qassam armed wing of Palestinian militant group Hamas said it launched hundreds of missiles at the southern Israeli city of Ashkelon, saying the attack was "in response to the displacement of civilians."

It came shortly after the 5 p.m. local time deadline Hamas had given Ashkelon residents to leave the premises had passed.

On Tuesday, Israel's military said it had regained control of the Gaza-Israel border after Hamas launched a surprise attack on southern Israel unprecedented in scope and deadliness.

Israel continues its airstrikes all over the enclosed territory of Gaza, and has ordered the complete cutting of water, electricity and food to the already impoverished and blockaded population of roughly 2.3 million people.

Hamas, which governs the Gaza Strip, said it has some 150 Israeli hostages in captivity. The U.S. and other governments are working to determine the number of foreign hostages in Hamas' captivity.

The death toll from the ongoing violence between Israel and Hamas has passed 1,800, with more than 1,000 people killed and 2,700 injured in Israel and at least 900 people killed and 4,500 injured in Gaza, according to Palestinian and Israeli health services.

Editor's note: There are discrepancies on the number of people killed and injured between various official outlets on both sides.

Calls for Qatar sanctions over Hamas links misconstrue nature of relationship: ex-U.S. ambassador to Yemen

Any call to sanction Qatar because of its links to Hamas "simply misunderstands and misconstrues" the nature of their relationship, according to a former U.S. ambassador to Yemen.

"Qatar does not operate in Gaza without an Israeli green light, and so for people to turn around and say well, the Qataris deserve sanctions because of the relationship with Hamas, it simply misunderstands and misconstrues the nature of their relationship," Gerald M. Feierstein, Washington-based Middle East Institute's director for Arabian Peninsula Affairs, told CNBC Street Signs Asia.

"They have long maintained a close relationship with Hamas and have invested in Gaza," he added. "They have been providing various kinds of project support and other kinds of support to Gaza for many years — all of it done with the full knowledge and acquiescence of the government of Israel."

"Qatar has played an important role — with cooperation with the United States — in promoting security and stability of the region. They have often played a very useful role, as we're talking it right here, in terms of mediating," said the retired diplomat, who was the U.S. ambassador to Yemen between 2010 and 2013 under the Obama administration.

"The fact that they maintain these kind of relationships with parties on all sides of the issue, is what enables them to actually be helpful and useful in these kinds of very complicated situations," he added.

Qatar's foreign ministry told Reuters Oct. 9 the Gulf state is involved in mediation talks with Hamas and Israeli officials, including over a possible prisoner swap.

Feierstein said the idea of a ground invasion would be "extremely difficult" for the Israeli army because the Gaza Strip is one of the most densely populated places in the world.

"A negotiated solution would be preferable, but ... it would be complicated or it would probably take a while. If there's a negotiated end to this conflict, the Israelis would need to accept something considerably below that target."

— Clement Tan

Hamas slams Biden's ‘sheer evil’ label, saying it's 'double standards'

Hamas has condemned Biden's comments calling the militant group's attacks on Israel were "sheer evil."

The group accused Biden of "double standards" for excusing Israel's occupation and regular raids on one of Islam's most sacred sites at Al-Aqsa Mosque in East Jerusalem on the West Bank.

After avoiding military operations against Israel since 2021, Hamas on Saturday infiltrated the Jewish state after launching a surprise assault by air, sea and land on parts of southern Israel that border the Gaza Strip.

The dawn attacks — which occurred over the Jewish holiday of Simchat Torah and came 50 years after the outbreak of the 1973 Arab-Israeli war — killed hundreds and wounded thousands in Israel. It spurred retaliatory strikes from Israel that have killed hundreds of civilians in the Gaza Strip so far.

— Clement Tan

Correction: This post has been updated to reflect that Hamas attacked Israel on Saturday. An earlier version misstated the day.

First plane carrying U.S. military supplies arrives in Israel

The first plane carrying U.S. ammunition and military supplies has landed at an air base in southern Israel, the Israeli Defense Force said.

The weapons are aimed at facilitating Israel's military operations and boosting its preparedness as the nation defends itself against Hamas militants that infiltrated Israel on Saturday.

"We are grateful for the U.S. backing and assistance to the IDF," the force said. "Our common enemies know that the cooperation between our militaries is stronger than ever, and is a key part in ensuring regional security and stability."

U.S. President Joe Biden has pledged to provide "surging additional military assistance, including ammunition, and interceptors to replenish Iron Dome" to the Jewish state.

"We are going to make sure that Israel does not run out of these critical assets to defend its cities and its citizens," Biden said.

— Joanna Tan

Biden posts photo of phone call with Prime Minister Netanyahu

President Joe Biden posted a photo of a phone call with Israel's Prime Minister Benjamin Netanyahu on Tuesday evening.

Like every nation in the world, Israel has a right and a duty to respond to these vicious attacks.

I just got off the phone with Prime Minister Netanyahu, and I told him:

If the United States experienced what Israel experienced, our response would be swift, decisive, and… pic.twitter.com/wvr7KigZOE

— President Biden (@POTUS) October 10, 2023

NBC News reported that Biden urged Netanyahu to minimize civilian casualties in the Gaza Strip.

In a 10-minute televised speech on Tuesday, Biden said he told Netanyahu that, "if the United States experienced what Israel is experiencing, our response would be swift, decisive, and overwhelming."

He added, "We also discussed how democracies like Israel and the United States are stronger and more secure when we act according to the rule of law. Terrorists purposefully target civilians, kill them. We uphold the laws of war - the law of war. It matters."

— Riya Bhattacharjee

Scenes of destruction and mourning in Israel

— Scott Mlyn

Israeli and Jewish schools reportedly urge parents to tell their kids to delete Instagram and TikTok to avoid disturbing images of hostages

Several reports say that Israeli and Jewish schools in the U.S. are urging parents to tell their kids to delete social media apps such as Instagram, TikTok, and X, formerly known as Twitter. Their concern is that Hamas may use social media to broadcast disturbing images, such as hostages begging for their lives.

A Tel Aviv school's parents' association sent a message saying "We cannot allow our kids to watch this stuff. It is also difficult, furthermore — impossible — to contain all this content on social media," according to a CNN report on Tuesday.

The principal of The Frisch School in Paramus, New Jersey, sent an email to parents urging them to tell their kids to delete Instagram and TikTok "immediately," reported the Jewish Telegraphic Agency, which added that "It was not clear where the information about forthcoming hostage videos was coming from."

Aviva Klompas, a co-founder of the Boundless Israel non-profit, shared via an X post one school's message to parents, which said that "It has been brought to our attention that videos of hostages begging for their lives will soon be released."

"Please remove the @TikTok and @instagram apps from your children's mobile phones," the message said.

— Jonathan Vanian

Satellite images show a large explosion and smoke from airstrike in Gaza City

— Scott Mlyn

Europe gives Elon Musk 24 hours to respond about Israel-Hamas war misinformation on X

Thierry Breton, the European commissioner for the internal market, said in a letter addressed to Musk on Tuesday that his office has "indications" that groups are spreading misinformation and "violent and terrorist" content on X, formerly known as Twitter, and urged the billionaire to respond within a 24-hour period.

The letter comes after numerous researchers, news organizations and other groups have documented a rise of misleading, false and questionable content on X, creating confusion about the current conflict.

Failure to comply with the European regulations around illegal content, referred to as the Digital Services Act, could result in fines worth 6% of a company's annual revenue.

Read the full story here.

— Jonathan Vanian

White House: Iran is 'complicit' in Israel attacks, no direct evidence

National Security Advisor Jake Sullivan told reporters Tuesday that Iran is "complicit" in Hamas' attack on Israel but there is no evidence linking Tehran to the violence over the weekend.

"We've said since the beginning that Iran is complicit in a broad sense because they have provided the lion's share of the funding for the military wing of Hamas, they've provided training, they have provided capabilities, they have provided support and they've had engagement and contact with Hamas over years and years, and all of that has played a role in contributing to what we have seen," Sullivan said.

"Now, as to the question of whether Iran knew about this attack in advance or helped plan or direct this attack, we do not, as of the moment I'm standing here at the podium, have confirmation of that."

— Emma Kinery

Biden stresses laws of war as Israel lays siege to Gaza

President Joe Biden has stressed the importance of upholding the laws of war as Israel responds with overwhelming force to Hamas' devastating terrorist attack that targeted hundreds of civilians.

Biden said he told Israeli Prime Minister Benjamin Netanyahu the U.S. response would be swift, decisive and overwhelming if the American people faced terrorism of the kind Israel has suffered in recent days.

The president described Hamas' intentional targeting of civilians as "pure, unadulterated evil."

But Biden said democracies are stronger and more secure when they act according to the rule of law.

"Terrorists purposely target civilians, kill them. We uphold the laws of war. It matters — there's a difference," Biden said in a televised address.

More than 1,000 Israelis have died in the attack Hamas launched on towns that border the Gaza Strip. At least 830 Palestinians have been killed by Israel's retaliatory strikes.

Israel on Monday ordered a "complete siege" of Gaza that would cut off electricity, food and fuel to the densely populated, impoverished enclave.

— Spencer Kimball

Sullivan says Biden, Netanyahu discussed identifying Hamas terrorists

National Security Advisor Jake Sullivan told reporters Tuesday it is his understanding that Israel does not plan to launch a total siege on Gaza, but Biden and Netanyahu discussed how to distinguish terrorists from civilians.

"We are consulting with the Israeli government about their actions in this regard," Sullivan said.

"President Biden and Prime Minister Netanyahu had the opportunity to talk through the difference between going full bore against Hamas terrorists and how we distinguish between terrorists and innocent civilians."

— Emma Kinery

Secretary Blinken will visit Israel on heels of terrorist attacks

U.S. Secretary of State Antony Blinken will travel to Israel tomorrow on the heels of unprecedented Hamas terrorist attacks on Israel.

State Department spokesperson Matt Miller announced Blinken's travel during a daily press briefing.

— Amanda Macias

American Airlines suspends Tel Aviv flights until at least Dec. 5

American Airlines says it will suspend its flights to Tel Aviv until at least Dec. 5, the latest airline to alert customers about a lengthy service disruption in the wake of the Hamas attacks and Israeli retaliation.

American Airlines had been offering flights from New York's John F. Kennedy International Airport until this weekend when the carrier and other U.S. airlines halted service following the attacks.

Delta Air Lines on Monday said its Israeli nonstops from the U.S. won't operate until at least Nov. 1. United Airlines, which had been flying to Tel Aviv more than any other airline, has suspended its service indefinitely.

— Leslie Josephs

No direct connection between Israel-Hamas conflict and oil prices yet: Height Capital’s Salisbury

Ben Salisbury, director of research and senior policy analyst at Height Capital Markets, joins "Squawk on the Street" to discuss the important elements to consider regarding oil price action as the Israel-Hamas conflict rages on, Iran's centrality to the global oil market and how Saudi Arabia plays into the fold.

— Anuz Thapa

Biden wants Congress to take 'urgent action' on security assistance as House remains leaderless

President Joe Biden said the White House will ask Congress to take "urgent action" to fund the national security requirements of U.S. allies in the wake of the devastating attack by Hamas on Israel.

Biden said his administration has worked closely with Congress throughout the crisis in Israel and Gaza.

"This is not about party or politics. It's about the security of our world — the security of the United States of America," the president said.

Congress faces paralysis right now as the House of Representatives remains leaderless a week after a faction of hard-right Republicans deposed Kevin McCarthy in a no-confidence vote.

There is little Congress can do until a new speaker is elected. House Republicans will vote Wednesday to select a nominee for the post, who will then face a full vote on the House floor.

It is unclear if the top candidates, House Majority Leader Steve Scalise and Judiciary Committee Chair Jim Jordan, can secure the 217 votes required to become speaker.

— Spencer Kimball

Biden confirms Americans are being held hostage, calls Hamas attack 'sheer evil'

President Joe Biden confirmed in a speech Tuesday afternoon at least 14 Americans have been killed in Israel.

Biden confirmed for the first time that Americans are among the people being held hostage by Hamas.

National Security Advisor Jake Sullivan told reporters after Biden's speech that the government believes there are around 20 or more Americans missing but noted that it didn't mean all 20 were taken hostage.

"We do not know the number of hostages we have at this time," Sullivan said.

— Emma Kinery

Airline and cruise stocks rebound after Monday's sell-off

Some travel-related stocks bounced back Tuesday after selling off during the previous session amid a spike in oil prices and as the conflict unfolded between Israel and the designated terrorist group Hamas.

Shares of United Airlines, Delta Air Lines and American Airlines gained at least 3%. The stocks sold off by more than 4% each during Monday's session amid a slew of flight cancelations coming in and out of the country. JetBlue Airways popped 3.6%, while Southwest Airlines added more than 2%.

Cruise stocks Carnival and Royal Caribbean rose 3.1% and 2.7%, respectively. Hotel stocks Marriott and Hilton gained about 3% each.

— Samantha Subin

Read more about the war's effect on the financial markets at CNBC's live market blog.

Israel-Hamas conflict isn't likely to have a huge market effect, says Goldman Sachs top strategist

Goldman Sachs' chief U.S. equity strategist David Kostin does not expect the Israel-Hamas conflict will have a huge effect on markets.

"It's a tragedy from a human point of view," Kostin told CNBC's "Squawk on the Street" on Tuesday. "But the idea fundamentally, we'll be getting earnings for the last three months, which is obviously backward looking. And the prospects looking forward are probably more domestically facing issues that are sort of pertinent to a lot of portfolio managers."

"So less likely to have a big impact on a sustainable basis," Kostin said.

Still, the strategist expects other risk factors will continue to weigh on stocks, citing higher yields and oil prices that could impede multiple expansion. He expects the S&P 500 will end 2023 around the 4,300 level, which is a little lower than where the broader index was last trading at about 4,380. He added cash is attractive.

However, he does not anticipate a recession on the horizon.

— Sarah Min

Read more about the war's effect on the financial markets at CNBC's live market blog.

Death toll in Israel passes 1,000, Israeli official says

A spokesperson for the Israeli Embassy in Washington, D.C., confirmed to NBC News that the death toll in Israel due to the conflict with Hamas has passed 1,000 people.

The conflict was triggered by a surprise air, land and sea attack by Hamas militants in Israel on Saturday.

— Amanda Macias

Israel considers state guarantees for Israeli airlines amid war

Israeli lawmakers said they would debate later this week about state guarantees for war risk insurance for the country's airlines, Reuters reported.

To continue flying at a time when many carriers have pulled out of the country, the government asked the parliamentary finance committee for a $5 billion guarantee to cover war risk policies.

Reuters also reported that Turkish Airlines became the latest foreign carrier to suspend service to and from Israel.

— Leslie Josephs

Nearly 400 U.S. lawmakers back Israel solidarity resolution

Nearly 400 members of the House of Representatives have backed a resolution expressing U.S. solidarity with Israel and promising to provide emergency security assistance if needed.

House Foreign Affairs Committee Chair Michael McCaul, R-Texas, and Rep. Gregory Meeks, D-N.Y., introduced the bipartisan legislation on Tuesday.

McCaul said he expects the House to pass the resolution as one of its first items of business once Republicans have selected a new speaker.

The resolution condemns Hamas' surprise attack on Israel as "barbaric" and "brutal," calling on the militant organization to immediately cease all violence and release the hostages it has kidnapped.

The legislation also condemns Iran's support for Hamas and Islamic Jihad and urges the full enforcement of U.S. sanctions against Tehran.

— Spencer Kimball

Biden to strongly condemn Hamas terror attacks and continued violence in the region

A White House official confirmed to NBC News that President Joe Biden is expected to strongly condemn Hamas' terrorist attacks over the weekend.

The surprise attacks have resulted in the deaths of hundreds of civilians, including at least 11 American citizens, as well as stunning reports of widespread kidnapping, rape and torture.

The U.S. leader is expected to convey steps his administration is taking in concert with allies to bolster Israeli security.

Biden will speak from the White House at 1 p.m. ET.

— Amanda Macias

Biden holds nearly 30 internal calls and meetings in wake of terror attacks in Israel

President Joe Biden has held nearly 30 internal meetings and calls in the wake of the unprecedented terror attacks carried out by Hamas militants in Israel, according to a list obtained by NBC News.

Israeli Prime Minister Benjamin Netanyahu said Monday in a televised speech that the Biden administration has been in constant contact since the attacks launched on Israeli civilians over the weekend.

Biden spoke to Netanyahu again Tuesday morning.

Saturday, Oct. 7

• Initial briefing from staff early morning
• Secure call with national security team
• Secure call with Israeli Prime Minister Benjamin Netanyahu
• Secure call with national security team
• Secure call with Vice President Kamala Harris
• Meeting with national security team
• Reconvene with national security team
• Secure call with Secretary of Defense Lloyd Austin
• Secure call with National Security Advisor Jake Sullivan
• Call with King Abdullah II of Jordan
• Secure call with CIA Director Bill Burns
• Call with Sen. Cory Booker
• Call with Rep. Dan Goldman
• Remarks review for statement on Israel
• Statement to press on Israel
• Reconvene national security team and senior advisors  
• Call with Deputy National Security Advisor Jon Finer
• Call with national security team

Sunday, Oct. 8

• Secure call with national security team
• Secure call with Israeli Prime Minister Benjamin Netanyahu
• Secure call with national security team
• National security update from staff
• National security update from staff 

Monday, Oct. 9

• Meeting with national security team
• Meeting with national security team
• Call with Sen. Cory Booker
• Reconvene national security team
• Joint call with French President Emmanuel Macron, German Chancellor Olaf Scholz, Italian Prime Minister Giorgia Meloni, British Prime Minister Rishi Sunak 
• Meeting with national security team

— Amanda Macias

UNICEF calls for the immediate and safe release of children being held hostage

The United Nations International Children's Emergency Fund, or UNICEF, warned of the rapidly deteriorating situation stemming from the Israel-Hamas conflict.

"Yet less than 72 hours after the outbreak of horrific violence in Israel, reports indicate that grave rights violations against children are rampant. Many children have been killed or injured, while countless others have been exposed to the violence," UNICEF Executive Director Catherine Russell wrote in a statement.

"I remind all parties that in this war, as in all wars, it is children who suffer first and suffer most," she added.

Russell called for the immediate and safe release of any children held hostage in Gaza.

— Amanda Macias

Cannot yet confirm if U.S. citizens are held hostage by Hamas, White House says

White House National Security Council spokesperson John Kirby said at this point, the Biden administration cannot confirm if any U.S. citizens are being held hostage by Hamas militants.

"We have to prepare for the grim possibility, the likelihood that they could," Kirby told MSNBC's "Morning Joe."

"There is a number of unaccounted for Americans. We're hearing from lots of families, as you might expect, who are trying to get information about loved ones they haven't heard from," Kirby said.

"Some of these folks could be lost, some of them could be hurt in hospitals, some of them could be missing, but we have to prepare ourselves for the possibility, the likelihood, that some of them are being held hostage," he added.

President Joe Biden confirmed Monday that at least 11 U.S. citizens were among those killed in the Israel-Hamas conflict.

— Amanda Macias

Total death toll surpasses 1,700 as violence between Israel and Hamas persists, authorities say

The latest official figures indicate that at least 830 Palestinians and more than 900 Israelis have been killed amid the ongoing violence.

The Health Ministry in Gaza said in a Facebook post that at least 830 citizens had been killed, with 4,250 injured.

Israel's Defense Forces, meanwhile, said more than 900 people had been killed during the conflict, with 2,741 people injured.

— Sam Meredith

Root causes of the conflict must be addressed to break cycle of violence: Head of Palestinian mission to UK

The root causes of the Israeli-Palestinian conflict must be addressed in order to end the cycle of violence and reach a just solution, Husam Zomlot, head of the Palestinian mission to UK, told CNBC.

"Instead of wasting this precious time talking about the consequences, we should talk about the root causes. And I am here to talk about the root causes. Do not underestimate people's desire for freedom," Zomlot said. "This isn't about the last 48 hours. This is about 100 years of complete neglect, dehumanization of the Palestinian people. And this is an opportunity ... for all of us to wake up to be brave, and to really call a spade a spade," he said.

The United Nations classifies Israel as an occupier state over the Palestinian territories, whose occupations and annexations following the 1967 Six-Day War remain in violation of international law. Since that time, Israel has been accused by the U.N. and rights organizations of numerous human rights abuses against Palestinians including the denial of basic services, killing of civilians, and restriction of movement. Israel says its policies are designed to keep its population safe and are the result of Palestinians' actions.

"We have failed to gather, all of us, the international community primarily to give people hope and aspiration," Zomlot said. "And this is a wake up call for all of us that we need to do actually provide such an alternative path. Palestinian people have been subjected to oppression and brutality for 100 years."

— Natasha Turak

Hamas military unit attacks southern Israeli city after setting deadline for citizens to leave

The military wing of Hamas says it launched a volley of rockets toward Ashkelon Tuesday afternoon "in response to the displacement of civilians."

Al-Qassam, the armed wing of Hamas, had earlier set a deadline of 5 p.m. local time (10 a.m. ET) for Ashkelon citizens to leave.

"Al-Qassam Brigades renewed the bombing of occupied Ashkelon in response to the displacement of civilians," al-Qassam said via Telegram, according to a Google translation.

— Sam Meredith

Goldman Sachs sees potential longer term impact on oil production due to conflict

Commodities analysts at Goldman Sachs outlined two potential outcomes of the rapidly escalating Israel-Hamas war that it said could impact oil production and prices in the medium to longer term.

One is that Saudi Arabia scraps plans for a potential U.S.-brokered normalization deal with Israel, which reportedly could have resulted in — among other things — increased Saudi oil production as a means to gain Congress' support for defense benefits from Washington that would come along with a normalization deal.

"This weekend's developments reduce the probability of an early unwind of the Saudi production cuts," the bank's analysts wrote, adding that Saudi production staying at its currently planned volume of 9 million barrels per day in 2024 "would raise our December 2024 Brent price forecast to $104/bbl, or $4/bbl above our $100/bbl baseline."

The second potential outcome Goldman highlighted is a decrease in Iranian oil production. "With the possibility of broader regional tensions re-escalating as a result of the conflict in Gaza, we think the risks to our Iranian production projections are now tilted to the downside," it wrote.

The bank noted "that there has been no impact to current global oil production" from the conflict, and that it "sees as unlikely any immediate large effect on the near-term supply-demand balance and near-term oil inventories."

— Natasha Turak

Israel says sirens sounding in city of Be’er Sheva and south of the country

Israel's Defense Forces said via X, formerly known as Twitter, that sirens are sounding in the city of Be'er Sheva and the south of the country.

— Sam Meredith

What is Hamas? What you need to know about the militant group

Hamas' devastating surprise attack on Israel over the weekend thrusts an obscure militant Palestinian group firmly into the global spotlight.

The ongoing violence raises questions about the history, motivations and future of Hamas — a group that has been recognized as a terrorist organization by the U.S., Japan, Australia, Israel, the European Union and many other countries.

Founded in 1987, Hamas is one of two major political forces in the Palestinian territories and has controlled the Gaza Strip since 2007. The military wing of Hamas is known as the al Qassem Brigades, the largest and best-equipped military group operating within Gaza.

Here's the full story.

— Sam Meredith

Funeral ceremony help for Palestinian journalists killed by Israeli airstrikes on Gaza

Editors Note - Graphic Content: The following post contains graphic content depicting death in Gaza.

A funeral ceremony held for Palestinian journalists Saeed Al-Taweel and Mohammad Sobh, who were killed in Israeli airstrikes in the Gaza Strip on Oct. 10, 2023. The journalists were killed while filming the targeting of a residential building by Israeli warplanes in Rimal district in western Gaza. 

— Getty Images

Hamas urges Palestinian, Muslim and Arab people to mobilize on Friday

Palestinian militant group Hamas has issued a widespread call for the "free people of the world" to mobilize on Friday.

"We call on the Arab and Muslim world and the free peoples of the world to attend the Al-Aqsa Flood event on Friday in order to voice solidarity with the Palestinian people and resistance, expose the Israeli occupation's crimes and foil its aggressive schemes, and defend the Al-Asqa Mosque," the group said in a statement on its site Tuesday.

It also urged the Palestinian people to launch mass protests against Israel and called on the "free peoples of the world to express solidarity with the Palestinian peoples."

The group's weekend "Operation Al-Aqsa Flood" involved an unprecedented surprise attack targeting Israeli civilians which has been widely condemned by the international community. It triggered a conflict that has claimed nearly 1,700 lives at the time of writing.

The name of Hamas' operation deploys religious symbolism by referencing the Al-Aqsa mosque in Jerusalem, one of three holy Muslim sites, which Hamas accuses Israel of seeking to desecrate.

— Ruxandra Iordache

Air raid sirens sound in Tel Aviv and across Israel

Air raid alert sirens are sounding across Tel Aviv and Israel, the Israeli Defense Forces wrote on the X social media platform, previously known as Twitter.

The attack warnings come as Israel carries out airstrikes over Gaza and as death counts in both Israel and the blockaded Palestinian territory mount.

Israel is mobilizing 300,000 military reservists — its highest figure ever — to go on the offensive against the Palestinian militant organization Hamas.

🚨Sirens sounding in Tel Aviv and across Israel🚨

— Israel Defense Forces (@IDF) October 10, 2023

— Natasha Turak

Hamas armed wing tells citizen of Israeli city to leave before 5 p.m. local time

The al-Qassam brigades, an armed wing of Palestinian militant group Hamas, posted a warning on social media for citizens of the Israeli city Ashkelon.

"In response to the enemy's crime of displacing our people and forcing them to flee their homes in several areas of the Gaza Strip, we give the residents of the occupied city of Ashkelon a deadline to leave it before five o'clock this evening, and those who warned are excused," spokesperson Abu Ubaida said on Telegram, according to a Google translation.

Al-Qassam did not elaborate on why it was issuing this warning.

The deadline of 5 p.m. in Israel translates to 10 a.m. ET, and 3 p.m. London time.

Ashkelon is located just north of Gaza, on Israel's Mediterranean coast.

— Katrina Bishop

Netanyahu's coalition backs emergency government

All members of Israeli Prime Minister Benjamin Netanyahu's coalition have approved a proposal to include opposition politicians in an emergency government, Reuters reports.

Netanyahu raised the possibility of the measure at a weekend meeting with Opposition Leader Yair Lapid and National Unity party leader Benny Gantz following an unprecedented lethal attack by Palestinian militant group Hamas. A unity government could further Israel's efforts to reach stability in the wake of the tragedy.

"National emergency government. now!" Finance Minister Bezalel Smotrich said in a post on the X social media platform, previously known as Twitter.

Political unity has been difficult to achieve in Israel, with the stability of Netanyahu's own government in question for most of the year following the prime minister's controversial and repeatedly protested proposal for a widespread judiciary reform. Netanyahu survived a no-confidence vote in March.

— Ruxandra Iordache

Biden set to deliver remarks on Hamas attack in Israel

U.S. President Joe Biden will address the unprecedented terror attacks carried out over the weekend by Palestinian militant group Hamas, as violence soars in the Middle East.

Biden's remarks, slated for 1 p.m. ET from the White House, come on the heels of what the Pentagon has dubbed as "ISIS-level savagery" in Israel.

The Israel-Hamas conflict, which has so far claimed the lives of nearly 1,700 people, has triggered the movement of U.S. firepower to the region, in an effort to bolster Israeli security.

In a statement on Monday evening, Biden confirmed the deaths of at least 11 Americans in Israel and acknowledged that some U.S. citizens may have been kidnapped by Hamas. He said he directed a team to work with Israeli counterparts "on every aspect of the hostage crisis."

The Pentagon on Monday said it is coordinating with the U.S. defense industry to expedite the shipping of pending Israeli weapon orders.

Read the full story here.

— Amanda Macias

All bets are off if the U.S. gets involved in the Israel-Hamas conflict, research fellow says

Research Fellow for Middle East Policy at the IISS, Hasan Alhasan, discusses how the international community could impact the Israel-Hamas conflict.

Israeli soldiers survey the grounds of the Supernova music festival after fatal attack by Hamas

Israeli soldiers are pictured surveying the grounds of the Supernova electronic music festival after Saturday's deadly attack by Palestinian militant group Hamas. Around 260 people died, and more than 100 were taken hostage in the incident, according to the ZAKA rescue agency.

- Ilia Yefimovich/picture alliance via Getty Images

U.N. human rights official condemns strikes against civilians

U.N. High Commissioner for Human Rights Volker Türk condemned attacks on civilians in the ongoing conflict between Israel and Palestinian military group Hamas in a statement out Tuesday.

Israeli forces have engaged in a series of retaliatory strikes following a Saturday offensive by Hamas, which openly targeted civilians and opened fire at the site of a musical festival.

Türk criticized the bloodshed triggered by Hamas, saying he was "deeply shocked and appalled by allegations of summary executions of civilians, and, in some instances, horrifying mass killings by members of Palestinian armed groups."

"It is horrific and deeply distressing to see images of those captured by Palestinian armed groups being ill-treated, as well as reports of killings and the desecration of their bodies," he said. "Civilians must never be used as bargaining chips."

He said that Israeli air strikes have also hit residential areas in the Gaza Strip, schools and the local premises of the U.N. Relief and Works Agency.

"International humanitarian law is clear: the obligation to take constant care to spare the civilian population and civilian objects remains applicable throughout the attacks," he said.

Türk further condemned a decision by Israel to impose a siege on the Gaza Strip, depriving the already vulnerable region of fuel, food, electricity and water supplies.

"This risks seriously compounding the already dire human rights and humanitarian situation in Gaza, including the capacity of medical facilities to operate, especially in light of increasing numbers of injured," he said. "The imposition of sieges that endanger the lives of civilians by depriving them of goods essential for their survival is prohibited under international humanitarian law."

U.N. Secretary-General Antonio Guterres had previously expressed on Monday that he was "deeply distressed" by the siege announcement.

— Ruxandra Iordache

EU invites Israeli, Palestinian Authority foreign ministers to emergency meeting

The European Union's top diplomat Josep Borrell said he has invited both Israeli Foreign Minister Eli Cohen and Palestinian Authority Foreign Minister Ryiad al-Maliki to an emergency meeting of the European Foreign Affairs ministers later on Tuesday.

Borrell made the announcement in a social media post on X, previously known as Twitter.

The meeting will cover developments in Israel following a lethal and unprecedented strike by Palestinian militant group Hamas over the weekend. The conflict has so far claimed over 1,600 lives. EU ministers will convene in Muscat, Oman, where Borrell was already scheduled to co-chair a meeting of the EU and Gulf Cooperation Council.

The international community has largely condemned the attack by Hamas. The U.N. has acknowledged Israel's security concerns while also urging an obligation to spare civilian populations amid the hostilities.

— Ruxandra Iordache

Iran says Israel suffered an 'irreparable failure' in its intelligence

Iran's top official Ayatollah Ali Khamenei on Tuesday said Israel suffered an "irreparable failure, both militarily and in terms of intelligence" amid the weekend attack by Palestinian militant group Hamas.

U.S.-sanctioned Iran, historically a supporter of Hamas and a long-standing rival of Israel, claims it was not involved in the offensive, which has resulted in at least 1,587 deaths at the time of writing.

"We kiss the foreheads and arms of resourceful and intelligent designers and Palestinian youth, but those who say that the recent saga is the work of non-Palestinians have miscalculated," he said in Google-translated comments carried by the Iranian state-owned Islamic Republic News Agency.

Since the weekend hostilities, Israel has carried out an intense retaliatory offensive which includes a "complete siege" of the Gaza Strip and has resulted in droves of displaced Palestinians.

— Ruxandra Iordache

More than 187,500 people displaced in Gaza Strip, U.N. says

Displacements across the Gaza Strip have "escalated" over the past 24 hours, affecting 187,518 people, according to the latest figures from the U.N. Relief and Works Agency out on Tuesday.

The agency expects these numbers to increase further and notes that around 3,000 Palestinians in Gaza remain displaced, following previous escalations.

Israel has declared a "complete siege" of the Gaza Strip, banning fuel, water and electricity supplies to the region in retaliation for the surprise multi-pronged attack of Palestinian militant group Hamas over the weekend.

"While I recognize Israel's legitimate security concerns, I also remind Israel that military operations must be conducted in strict accordance with international humanitarian law," U.N. Secretary-General Antonio Guterres said Monday, noting reports of Israeli missiles striking health facilities in Gaza, multi-story residential towers and a mosque.

"I am deeply distressed by today's announcement that Israel will initiate a complete siege of the Gaza Strip. Nothing allowed in, no electricity, food or fuel. The humanitarian situation was extremely dire before these hostilities. Now, it will only deteriorate exponentially," he added.

— Ruxandra Iordache

Israeli Air Force brings back soldiers from abroad

The Israeli Air Force sent transport planes to bring back "hundreds" of soldiers of the Israeli Defense Force who were abroad.

The soldiers will "take part in the fighting in the 'Iron Swords' war, as part of the IDF's efforts to mobilize additional forces to continue fighting," the IAF said Tuesday in a Google-translated post on the X social media platform, previously known as Twitter.

Israel launched operation "Iron Swords" in retaliation for the unexpected and bloody Saturday attack by Palestinian militant group Hamas. Israel has said it has drafted 300,000 reservists as part of its response.

Military service is compulsory for most Israeli citizens over the age of 18, with enlisted men and women expected to serve a minimum of 32 and 24 months, respectively. Israeli Arabs are exempt.

— Ruxandra Iordache

Israel's military says it has 'restored full control' over Gaza border

Israel's military said it had regained control of the Gaza-Israel border, four days after the surprise attack from Hamas militants inflicted the highest casualty toll on Israel in fifty years.

Israeli Defense Forces spokesperson Richard Hecht said that about 1,500 bodies of Hamas militants were found in Israel territory as the country's forces "restored full control" over the border. Hecht said that no Hamas fighters have entered into Israel since last night, but infiltration is still possible.

— Natasha Turak

Israel's economy has 'room for a long conflict,' strategist says

Israel's economy can withstand an extended conflict of more than eight weeks, Bob Savage, head of Markets Strategy and Insights at BNY Mellon, said in a note on Tuesday.

"The ability for Israel to handle an extended war – over eight weeks – is very different now than back in 1973," Savage said, referencing the Arab-Israel conflict that kicked off nearly fifty years to the day of the multi-pronged Saturday offensive of Palestinian militant group Hamas.

"There are some notable economic strengths along with political shifts in play. Israel has links to Egypt and to UAE, along with some significant natural gas reserves now. When you look at Israel's budget situation, it appears to have plenty of room for war spending," the note added, pointing to the prospect of higher defense spending and "more unification around preventing this from happening again."

Over the course of the year, Israel's civil unity was fissured by widespread protests in response to Prime Minister Benjamin Netanyahu's broad judicial reforms, which opponents questioned could propel the nation toward autocracy.

— Ruxandra Iordache

Death toll from Israel-Hamas conflict passes 1,500

The death toll from the ongoing violence between Israel and Hamas has passed 1,500, with over 900 killed and 2,600 injured in Israel and at least 687 people killed and 3,700 injured in Gaza, according to Palestinian and Israeli health services.

The conflict, declared a war on Saturday by Israel's President Benjamin Netanyahu, is now in its fourth day as Israel bombards the Gaza Strip with airstrikes in retaliation for the terrorist attack carried out by Palestinian militant group Hamas in southern Israel.

Some 150 Israeli hostages remain captive by Hamas in Gaza, Israeli officials said Monday. The U.S. and other governments are working to determine how many foreign nationals are among the hostages.

— Natasha Turak

North Korea weighs in on Israel-Hamas conflict

A North Korean state media outlet pinned fault on Israel for the recent violence with Palestinian militant group Hamas, in a rare opinion on the conflict from Pyongyang.

"The international community called this clash a bloody conflict, saying it was the result of Israel's constant criminal acts against the Palestinian people. They claim that the fundamental way to end it is to build an independent Palestinian state," a brief article carried by Rodong Sinmun said Tuesday, according to a Google translation.

The publication serves the North Korea's ruling Worker's Party.

U.N.-sanctioned Pyongyang has frequently taken foreign policy positions that oppose those of the West, particularly the views of the United States. The international community has largely expressed support for the losses of Israel and called for a cease-fire.

— Ruxandra Iordache

Scenes of destruction in Israel and Gaza as demonstrations take place across the world

— Scott Mlyn and Adam Jeffery

Saudi Arabia pledges support for the Palestinian people

Saudi Arabia announced its support for the Palestinian people in a call with President Mahmoud Abbas, Palestinian news agency WAFA reported.

"President Abbas expressed appreciation for the firm position and efforts exerted by Saudi Arabia in support of the Palestinian people and their just cause," the report stated.

"The Saudi Crown Prince affirmed that his country will continue to stand by the Palestinian people and that it is exerting great efforts to ensure the return of calm and stability."

Abbas is the head of the Palestinian Authority, the internationally recognized government of the Palestinian people. He is also the head of Fatah, the other major Palestinian party that's a key rival to Hamas. The Palestinian Authority currently administers part of the West Bank.

On Saturday, Saudi Arabia stated it does not support the attacks, and has joined global calls for a de-escalation.

— Lee Ying Shan

France, Germany, Italy, UK and US pledge support to Israel in joint statement

The leaders of France, Germany, Italy, the United Kingdom and the United States reiterated their support for Israel and "for a peaceful and integrated Middle East region" during a call earlier today.

"We make clear that the terrorist actions of Hamas have no justification, no legitimacy, and must be universally condemned. There is never any justification for terrorism," the leaders wrote in a joint statement.  

"Our countries will support Israel in its efforts to defend itself and its people against such atrocities. We further emphasize that this is not a moment for any party hostile to Israel to exploit these attacks to seek advantage," wrote French President Emmanuel Macron, German Chancellor Olaf Scholz, Italian Prime Minister Giorgia Meloni, British Prime Minister Rishi Sunak and American President Joe Biden.

— Amanda Macias

Biden confirms 11 Americans killed in Israel

President Joe Biden confirmed at least 11 Americans were killed in Israel. "Sadly, we now know that at least 11 American citizens were among those killed—many of whom made a second home in Israel," Biden said in a statement released by the White House.

Commenting on hostages, Biden said: "I have directed my team to work with their Israeli counterparts on every aspect of the hostage crisis, including sharing intelligence and deploying experts from across the United States government to consult with and advise Israeli counterparts on hostage recovery efforts."

Read the full statement from the president:

Statement from President Joe Biden on American Citizens Impacted in Israel

As we continue to account for the horrors of the appalling terrorist assault against Israel this weekend and the hundreds of innocent civilians who were murdered, we are seeing the immense scale and reach of this tragedy. Sadly, we now know that at least 11 American citizens were among those killed—many of whom made a second home in Israel.
 
It's heart wrenching. These families have been torn apart by inexcusable hatred and violence. We also know that American citizens still remain unaccounted for, and we are working with Israeli officials to obtain more information as to their whereabouts. My heart goes out to every family impacted by the horrible events of the past few days. The pain these families have endured, the enormity of their loss, and the agony of those still awaiting information is unfathomable.
 
The safety of American citizens—whether at home or abroad—is my top priority as President. While we are still working to confirm, we believe it is likely that American citizens may be among those being held by Hamas. I have directed my team to work with their Israeli counterparts on every aspect of the hostage crisis, including sharing intelligence and deploying experts from across the United States government to consult with and advise Israeli counterparts on hostage recovery efforts.
 
For American citizens who are currently in Israel, the State Department is providing consular assistance as well as updated security alerts. For those who desire to leave, commercial flights and ground options are still available. Please also take sensible precautions in the days ahead and follow the guidance of local authorities.
 
This is not some distant tragedy. The ties between Israel and the United States run deep. It is personal for so many American families who are feeling the pain of this attack as well as the scars inflicted through millennia of antisemitism and persecution of Jewish people. In cities across the country, police departments have stepped up security around centers of Jewish life, and the Department of Homeland Security, the Federal Bureau of Investigation, and other federal law enforcement partners are closely monitoring for any domestic threats in connection with the horrific terrorist attacks in Israel.
 
In this moment of heartbreak, the American people stand shoulder-to-shoulder with Israelis. We remember the pain of being attacked by terrorists at home, and Americans across the country stand united against these evil acts that have once more claimed innocent American lives. It is an outrage. And we will continue to show the world that the American people are unwavering in our resolve to oppose terrorism in all forms. 
 
The United States and the State of Israel are inseparable partners, and I affirmed to Prime Minister Netanyahu again when we spoke yesterday that the United States will continue to make sure Israel has what it needs to defend itself and its people.

— Riya Bhattacharjee

Read CNBC's previous live coverage here:

Iran's UN mission denies involvement in Hamas attacks; Gaza under 'complete siege'