August 10, 2017 7:30 pm Wood Construction Causes Concern With a 10-alarm fire in Waltham, Massachusetts, being determined to have been intentionally set, the NBC Boston Investigators are looking into construction materials that may cause flames to spread even faster. US & World Videos 1:34 Eight people injured in building fire in Gloucester 2:08 Concern rises as drone sightings are reported in Massachusetts and New Hampshire 2:14 Community demands answers on the death of Mass. State Police trooper during training exercise 2:10 Authorities continue fixing water main break in Boston 2:50 Water main break floods Boylston Street in Back Bay