December 4, 2015 12:35 pm FBI Probes Shooting as Act of Terrorism The FBI officially announced at a news conference that the San Bernardino mass shooting was being investigated as an act of terrorism. Toni Guinyard reports for the NBC4 News at Noon on Friday, Dec. 4, 2015. US & World Videos 2:55 Protesters' barricades come down at UCLA following a violent night 1:52 Huntington Park fire station catches fire 2:56 Police putting up barricades on UCLA campus after overnight brawl 3:16 First Alert Forecast: Warm Wednesday before cool-down, possible shower 4:00 Firecrackers thrown at pro-Palestinian encampment during protester clash at UCLA