Israel orders troops to remain in Syria buffer zone through winter

Israel ordered troops Friday to prepare to remain throughout winter on Mount Hermon — a strategic peak inside a buffer zone that has existed for decades with Syria but which Israeli forces have seized in the wake of the Assad regime's collapse.

“Due to what is happening in Syria, there is a huge security importance to our holding of the Hermon peak and everything must be done to ensure the IDF’s preparations in the area, to allow the troops to stay there in the difficult weather conditions,” Israeli Defense Minister Israel Katz said in a statement.

Israel has said its deployment to the buffer zone was temporary and defensive, but concerns have grown over what United Nations chief António Guterres on Thursday called “extensive violations of Syria’s sovereignty and territorial integrity" as he urged Israeli forces to withdraw from the buffer zone.

He also expressed concern over hundreds of Israeli strikes on locations across Syria following the toppling of the Assad regime, which Israel has said are aimed at preventing the regime’s arsenal falling into the hands of militants.

On Friday, Katz shared a photo on X that he said showed him with Israeli Prime Minister Benjamin Netanyahu overlooking the Syrian peak of Mount Hermon with binoculars, saying the site had "returned to Israeli control after 51 years."

"An exciting historical moment," he wrote.

Netanyahu's office has said that the collapse of the Assad regime "created a vacuum on Israel’s border and in the buffer zone," which was established as part of a ceasefire between the countries following the 1973 Arab-Israeli War.

"Israel will not permit jihadi groups to fill that vacuum and threaten Israeli communities on the Golan Heights with October 7th style attacks," his office said.

Israel occupied and later annexed the Golan Heights after the 1967 Mideast war, a move not recognized by most of the international community.

At over 9,000 feet, Mount Hermon stands as the highest peak in the eastern Mediterranean coast. Israel has drawn swift backlash over its seizure of the area in the past week, with critics accusing the country of exploiting the evolving situation in Syria in pursuit of a land grab.

In Syria, crowds gathered across the country on Friday for mass rallies celebrating President Bashar al-Assad's ouster after worshippers gathered for the first Friday prayers since his family's 50 years of brutal rule was brought to an end in a stunning advance by rebel forces.

Abu Mohammad al-Jolani, the leader of the main rebel group that ousted Assad, called on Syrians in a video message to "take to the squares to celebrate the victory."

But he urged revelers to celebrate without firing bullets or causing a commotion "so that we can then move on to building this country."

Deadly strikes continue in Gaza

Concerns over Israel's actions in Syria come as Israeli forces also continued their more than yearlong campaign in Gaza, where Palestinian health officials said dozens of people were killed in an assault on the Nuseirat refugee camp on Thursday.

Dr. Muneer Al-Boursh, director general of the Gaza Health Ministry, said in the early hours of Friday morning that at least 33 people were killed and more than 84 missing and injured after Israeli forces struck a post office building and several homes in the area in central Gaza.

The Israel Defense Forces said it was targeting a "senior terrorist in the Islamic Jihad" whom it said was "responsible for leading terror attacks against Israeli civilians an IDF troops."

The IDF said an initial inquiry suggested that "secondary explosions" occurred due to numerous weapons in the area targeted. The IDF did not provide evidence for the claim and said it was reviewing reports of casualties related to the strike.

Video captured by NBC News' crew on the ground in Gaza showed harrowing scenes of people being rescued from a mass of rubble. At one point, a young child could be seen being carried into a hospital, with their face heavily bloodied and their body motionless.

The child was laid down in a room where the bodies of those killed were being wrapped in shrouds. Another small child could also be seen lying on the floor.

It comes as the Biden administration has continued to push for a ceasefire deal between Israel and Hamas in its final months.

U.S. national security adviser Jake Sullivan said in a news conference in Tel Aviv on Thursday that he was optimistic about the prospect of reaching a deal that would bring an end to Israel's deadly offensive in Gaza and see Israeli hostages who remain held in the enclave released.

He also defended Israel's actions in Syria, saying the country had perceived an "immediate threat" in the collapse of a longstanding regime as he maintained that Israel has "a right to self-defense."

This story first appeared on NBCNews.com. More from NBC News:

• Missing American Travis Timmerman's recovery in Syria is a 'Christmas miracle,' loved ones say
• Inside Assad's luxury palace, a modernist sanctuary from the Syria he tore apart
• U.S. airman in Japan is sentenced to 5 years in prison for sexually assaulting a minor