Los Angeles, June 1 (Reuters): At least two persons were shot dead at the University of California, Los Angeles, today, police and campus officials said, drawing officers in camouflage and tactical gear to the scene and prompting officials to lock down the campus.

Police were considering the possibility of a murder-suicide. "It is certainly possible that one of the victims is a shooter," UCLA police chief James Herren told reporters.

CBS News, citing an unidentified police source, said investigators no longer considered it an active shooter situation and that it was believed to be a murder-suicide.

Police found a suicide note and handgun, NBC Los Angeles reported, citing an unidentified source.

Los Angeles Police Department spokesman Aareon Jefferson reported two fatalities from the shooting but could not confirm any details about the victims or provide further information about the suspect. "The LAPD is continuing a methodical search of the campus and surrounding areas," police said. The campus remained on lockdown, UCLA's office of media relations said.

Bioengineering student Bahjat Alirani said police were yelling at people to run from the scene. "I was in Boelter Hall to take a final and I exit the staircase to see SWAT-looking police yelling at everyone to evacuate immediately," Alirani said.