Police in Northern California are responding to reports of a shooting at YouTube headquarters in San Bruno. City Manager Connie Jackson says there have been multiple 911 calls reporting a shooting and that police and fire officials have responded.
According to a tweet from the Associated Press, an unidentified woman who is believed to be the shooter is dead of a self-inflicted gun wound. Four other people reportedly have been injured.
TV helicopter video shows officers patting down people grouped outside a building and police vehicles surrounding the area. San Bruno police said they could not provide more information.
The world's biggest online video website is located on a suburban campus.
Calls and emails to YouTube representatives were not immediately returned Tuesday afternoon.
This post will be updated.