SAN BRUNO, Calif. — The latest related to the active shooter situation at YouTube's headquarters in Northern California [Timestamps local time]:

8:55 p.m.

A law enforcement official has identified the suspect in a shooting at YouTube headquarters as Nasim Aghdam of Southern California.

The official who was briefed on the investigation spoke to The Associated Press on the condition of anonymity because they were not authorized to discuss it.

San Bruno Police Chief Ed Barberini says a woman opened fire with a handgun in an outdoor courtyard Tuesday, then killed herself. Police provided no motive or other details about her.

Hospital officials have said a man is in critical condition and two women are in serious and fair condition.


2:40 p.m.

During a press briefing just after 2:30 p.m., San Bruno Police Chief Ed Barberini said arriving officers located a victim with a gunshot wound at the front of the building. They then located a dead woman inside the building. It's believed that woman was the shooter and died from a self-inflicted gunshot wound.

Officers then located two additional victims. In all, four people were taken to area hospitals, three of which suffered gunshot wounds. The extent of their injuries wasn't immediately know. 

SWAT teams conducted an extensive search of the building but it wasn't believed that there was any further threat. 

2:10 p.m.

Northern California's Stanford Hospital says it has received four to five patients from a shooting at YouTube headquarters.

Hospital spokeswoman Lisa Kim did not have information on their conditions or their wounds. 

Police in the city of San Bruno have confirmed an active shooter. City Manager Connie Jackson says multiple 911 calls reported a shooting and that police and fire officials have responded.

Television images showed people leaving the building in a line, holding their arms in the air for police to inspect as they were leaving the building. Officers then patted down people grouped outside.

1:42 p.m.

Google, which owns YouTube, has tweeted the following statement: 

The San Francisco branch of ATF is also onscene, per its Twitter

1:28 p.m.

Police in Northern California are responding to reports of a shooting at YouTube headquarters in the city of San Bruno.

City Manager Connie Jackson says there have been multiple 911 calls reporting a shooting and that police and fire officials have responded.

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.

ORIGINAL STORY [1:10 p.m.]

Police activity is being reported at YouTube's headquarters in Northern California. 

San Bruno is 24 miles south of San Francisco.

Employees of YouTube have sent out several tweets reporting an active shooter inside the building: