Three people shot in a shooting Tuesday afternoon at YouTube’s headquarters in San Bruno, California, police said.
The precise details of the shooting — including a motive — remained unclear later Tuesday but authorities believe the shooter, a woman, killed herself afterward, San Bruno Police Chief Ed Barberini told reporters.
Amid fleeing workers, officers on the scene found one living victim who had been shot and a dead woman with an apparently self-inflicted gunshot wound, whom investigators think is the shooter, Barberini said.
He did not rule out the possibility of another shooter but said none had been discovered as law enforcement swept through the building.
Barberini initially told reporters four people were injured, but later said three people were wounded by gunfire, according to the Associated Press. One other person was taken to the hospital for an ankle injury.
Fed Krysko, 21, was on his way to the mall when he came across the shooting where “tons of people” were stampeding to get out.
He tells PEOPLE the scene was pure “craziness.”
“I got there right after it was happening. I was driving down Cherry Avenue, the street YouTube is on, and it is swarming with police officers, so I pulled over and I get there just as people are being evacuated with their hands up,” he says.
Krysko says “at least 100 people” ran out of the building. “They were scared and in shock. They were just running with their hands up. It was a state of panic where you don’t know what is going on yet.”
A spokesperson for Zuckerberg San Francisco General Hospital, Brent Andrew, told reporters on Tuesday that three victims had been transported there.
While names were not released, details of the victims such as their ages and health status were available. A 32-year-old woman is in serious condition, while a 27-year-old woman is in fair condition. The third victim, a 36-year-old man is in critical condition, according to USA Today.
Chief Barberini said that while the investigation continues, police do not yet know what kind of weapon was used and he could not confirm the circumstances of the shooting. The relationship between the shooter and the victims, if any, was unclear.
YouTube employees are being interviewed by detectives, Barberini said. Multiple agencies remain on the scene.
YouTube employee Vadim Lavrusik posted on Twitter that he was at the office on Tuesday. “Heard shots and saw people running while at my desk,” he wrote. “Now barricaded inside a room with coworkers.”
Minutes later Lavrusik wrote to say that he had been “evacuated” and was okay.
A woman who was near YouTube’s offices during the shooting described a tumultuous aftermath as authorities swarmed the area.
“There were a lot of people in the streets watching everything going on, but they cleared the streets,” says the woman, a 40-year-old who lives in San Bruno and who asked not to be identified by name.
“We were scared,” the woman says. “We thought somebody was coming into the store where we were.”
The woman says that that in their supermarket, around the corner from YouTube, they quickly encountered people leaving the scene. “At the beginning a man came in with scratches on his face,” she says. “We thought he was the shooter but he wasn’t — he said he fell when he was running away.”
In a brief statement on Twitter, YouTube’s parent company, Google, wrote that it was “coordinating with authorities and will provide official information here from Google and YouTube as it becomes available.”
In a later post, Google wrote: “Our Security team has been working closely with authorities to evacuate the buildings and ensure the safety of employees in the area.”
Google CEO Sundar Pichai delivered a message to users hours after the incident.
“I’m grateful to everyone inside and outside the company for the outpouring of support and best wishes,” he wrote. “I am especially thankful to the first responders and our own security team who acted so quickly to keep people safe.”
He continued, “I know a lot of you are in shock right now. Over the coming days, we will continue to provide support to help everyone in our Google family heal from this unimaginable tragedy.”
A spokesman with the FBI’s office in San Francisco says the bureau is monitoring the situation but he did not know if agents had responded to the scene, as San Bruno police were leading the investigation given that the site was a private business.
However, the spokesman stressed, the situation was fast evolving and the FBI could become more involved if needed or if asked to do so.
President Donald Trump said he had been “briefed on the shooting” and expressed his condolences via social media.
“Our thoughts and prayers are with everybody involved,” he wrote on Twitter. “Thank you to our phenomenal Law Enforcement Officers and First Responders that are currently on the scene.”
• With reporting by ALICIA DENNIS, CHRISTINE PELISEK and HARRIET SOKMENSUER