A female suspect is dead and three people have been hospitalized with serious wounds from a shooting at YouTube headquarters in Northern California Tuesday afternoon. San Bruno, California Police Chief Ed Barberini told reporters that the unidentified woman opened fire with a handgun Tuesday around at 12:46 p.m.

Within two minutes of the initial 911 call, police responded with a heavy presence outside the YouTube building. Arriving, they found three victims, two of whom were alongside the body of a woman believed to be the shooter, who evidently died from a self-inflicted gunshot wound.

A crowd had gathered outside the building and police frisked and patted down everyone individually, while closing roadways near the building to through traffic.

A senior software engineer, Zach Vorhies, reported that many were calmly leaving the building following the sounding of the fire alarm when he caught a glimpse of the shooter in a courtyard yelling, “Come get me.”

The alleged shooter has not been identified as of this writing, and no motive or other details have been provided by the authorities. Hospital officials reported that a 36-year-old man was in critical condition, one 32-year-old woman was in serious condition and one 27-year-old woman was in fair condition.

Over 1,100 people are employed at the headquarters of YouTube, a subsidiary of Google, including engineers, sales teams, advertisers and content creators.

Never missing an opportunity to promote the police, President Trump tweeted praise and thanks to “our phenomenal Law Enforcement Officers and First Responders that are currently on the scene.”

While the motive for the shooting remains unclear, what is certain is that American society continues to produce mass shootings on an almost daily basis. An FBI study released in 2014 found that there were 160 mass shootings between 2000 and 2013. In only six of these was the shooter a woman.

This latest shooting rampage follows by seven weeks the shooting at Marjory Stoneman Douglas High School in Parkland, Florida that killed 17 people and triggered mass protests nationally and internationally led by high school students.