UCLA campus police are investigating a possible shooting on campus Wednesday, university spokesman Ricardo Vazquez said.
Police received reports of two victims down and an active shooter in or near the engineering building, Los Angeles Police Officer Tony Im said.
Officials put the campus on lockdown as authorities investigate the incident at Boelter Hall.
CNN senior law enforcement analyst Tom Fuentes said locking down a large university in an urban area is a “monumental task.” UCLA’s engineering building is in the middle of a very densely populated part of Los Angeles.
And if an active shooter is on campus, police face an exceptional challenge, Fuentes said.