Gunshots erupted at YouTube's offices in California today, sparking a panicked escape by employees and a massive police response, before the shooter -- a woman -- apparently committed suicide.
Police said three people had been hospitalised with gunshot injuries following the shooting in the city of San Bruno, and that a female suspect was found dead at the scene.
"We have one subject who is deceased inside the building with a self-inflicted wound," San Bruno Police Chief Ed Barberini told reporters. "At this time, we believe it to be the shooter."
Sherman said that as he headed for an exit "someone said that there was a person with a gun," and added "at that point every new person I saw was a potential shooter."
Sherman's tweets continued: "I looked down and saw blood drips on the floor and stairs. Peeked around for threats and then we headed downstairs and out the front."
Another YouTube employee, Vadim Lavrusik, tweeted: "Active shooter at YouTube HQ. Heard shots and saw people running while at my desk. Now barricaded inside a room with coworkers."
Google communications tweeted: "Re: YouTube situation, we are coordinating with authorities and will provide official information here from Google and YouTube as it becomes available."