A female shooter injured at least three people at YouTube headquarters in San Bruno, Calif., Tuesday, according to the police.
The assailant, who was described to ABC News as a white female adult wearing a headscarf, then shot and killed herself.
One of the victims is believed to be the shooter’s boyfriend, according to multiple outlets.
Brent Andrew, a spokesman for San Francisco General Hospital, told reporters at a Tuesday afternoon news conference that the hospital is treating three of the four victims, one of whom is in critical condition.
Multiple YouTube employees reported hearing gun shots on Twitter shortly before 1 p.m. One man said he saw blood on the ground while evacuating the building.
I looked down and saw blood drips on the floor and stairs. Peaked around for threats and then we headed downstairs and out the front.
— Todd Sherman (@tdd) April 3, 2018
Moments after the initial tweets, San Bruno police confirmed they were responding to an active-shooter situation in the building.
Police activity at 901 Cherry Ave, please stay out of the area. pic.twitter.com/H6iAj0g7ra
— San Bruno Police (@SanBrunoPolice) April 3, 2018
Videos taken outside the building show employees being evacuated with their hands raised above their heads.
“We are coordinating with authorities and will provide official information here from Google and YouTube as it becomes available,” Google’s communications team said in a statement.
President Donald Trump said he had been briefed on the incident in an afternoon tweet.
This post will be updated as more information becomes available.