Multiple law enforcement agencies have responded to an active shooter incident at the office campus of YouTube in San Bruno, CA. There are reports of casualties.
The San Mateo County Coroner's office has responded to the scene. Injured persons are being received at Stanford Hospital and San Francisco General Hospital, according to local media.
The shooting reportedly started at an outdoor café on the campus at around 1 p.m.
There are unconfirmed reports of two shooters, one male and one female.
The buildings on the YouTube campus are being evacuated by law enforcement.