UPDATE: Police say 2 dead in UCLA shooting
A UCLA press officer confirmed to NBC News that the shooting, involving two victims, occurred in Boelter Hall on the Westwood campus.
UPDATE: Two people were dead Wednesday after a shooting in an engineering lab at UCLA, Los Angeles police said. Law enforcement were sweeping the building for a possible active shooter, according to the university.
A campus-wide lockdown was put in place. A nearby hospital and three elementary schools were also on lockdown.
Hundreds of officers and agents swarmed the campus, working in concert with the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives, UCLA Police Chief Jim Herren said.
Authorities were investigating the possibility that one of the victims was the shooter and that the double homicide was a murder-suicide.
"There is that possibility, but we haven't confirmed that yet," Herren said.
The shots were fired at approximately 10 a.m. PT, prompting a campus-wide lockdown. A nearby hospital and three elementary schools were also put on lockdown.
Both victims were males, according to a statement from the LAPD.
UCLA, which has a quarter system for its academic calendar, is currently in finals week. Bahjat Alirani, a senior, told NBC News he was in the engineering building for an exam when he ran into a police officer.
"He was pointing a big gun and said for everyone to run and get out of the area," Alirani said.
Police investigating possible shooter at UCLA's Boelter Hall. Observe campus wide lockdown.— UCLA Newsroom (@UCLAnewsroom) June 1, 2016
Both the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives were responding to the incident at the request of the LAPD, but officials told NBC News they had no independent information yet.
UCLA, a public university, has more than 43,000 students.