WASHINGTON (Circa) -- Four people have been injured in a shooting at YouTube headquarters in San Bruno, California, according to San Bruno police.
San Bruno Police Chief Ed Barberini said the four victims include a deceased woman San Bruno police believe to be the shooter.
The suspect appears to have died from a self-inflicted gunshot wound, Barberini said.
Law enforcement sources tell The Associated Press the shooting is being investigated as a domestic dispute.
San Francisco General Hospital said they are currently treating three patients, a 36-year-old male in critical condition and two females. One female is in serious condition and the other is in fair conditions.
NBC Bay Area reports Zuckerberg San Francisco General Hospital has told them they're receiving patients.
City Manager Connie Jackson says there have been multiple 911 calls reporting a shooting and that police and fire officials have responded.
We are responding to an active shooter. Please stay away from Cherry Ave & Bay Hill Drive.— San Bruno Police (@SanBrunoPolice) April 3, 2018
Google says in a statement that they are working with law enforcement and will provide official information as soon as it becomes available.
The Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) San Fransisco offices are also responding to the scene.
Re: YouTube situation, we are coordinating with authorities and will provide official information here from Google and YouTube as it becomes available.— Google Communications (@Google_Comms) April 3, 2018
Lisa Kim, a representative with Stanford Health Care, said they are "treating 4-5 patients from the shooting. No word on their conditions."
Vadim Lavruski, who works at YouTube in the product department, says he "heard shots and saw people running while at my desk."
He was barricaded in a room with co-workers but later tweeted that he was able to evacuate.
Active shooter at YouTube HQ. Heard shots and saw people running while at my desk. Now barricaded inside a room with coworkers.— Vadim Lavrusik (@Lavrusik) April 3, 2018
Todd Sherman, product manager at Google, tweeted what happened in real-time saying as he headed towards the exits he "saw blood drips on the floor and stairs." Sherman also says he witnessed "police cruisers pull up, hopped out with rifles ready."
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
Will Hudson said his friend who works for YouTube texted him about the shooter, according to a report by the Associated Press.
"I think there might be a shooter in my building," read one text."The fire alarm went off so we started to evacuate and then people (started) running saying there was a shooter."
Hudson said his friend has made it safely back to San Francisco and is in contact with his family, Hudson said in the report. Hudson said he's become accustomed to hearing about such violence but has never been so close to it before.
"It just feels strange. It feels like it could really be anyone. That's really the strangeness of it," he said, in an interview with the Associated Press.
House Minority Leader Nancy Pelosi, D-Calif., said on twitter her office is following the events as they unfold.
The senior Senator from California Dianne Feinstein also tweeted about the ongoing active shooter situation.
My stomach sinks with yet another active shooter alert. I’m praying for the safety of everyone at YouTube headquarters.— Sen Dianne Feinstein (@SenFeinstein) April 3, 2018