Female shooter at YouTube HQ is dead, at least 3 others wounded

Don't know much details other than initial reporting. 
But, I got a feeling this was a personal beef this woman had with other people.

CNN reports a woman opened fire Tuesday at the YouTube headquarters in Northern California then apparently took her own life, officials said. 

At least three people were injured in the incident.

San Bruno Police Chief Ed Barberini said the dead woman was found at the scene and appeared to have killed herself, but the investigation was just beginning.

The shooter is believed to have known at least one of the victims, two law enforcement officials told CNN.

A spokesman for Zuckerberg San Francisco General Hospital, a level 1 trauma center, said the facility received three patients. One 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.

One witness inside a cafe near the shooting said the gunfire didn't immediately register with him.

"It was a surprise, because you don't really expect something like that," the man told CNN affiliate KPIX. "I heard some pops, I obviously thought it was balloons, but then I thought that doesn't make sense, not today. Then I heard more shots and that's when everyone started scrambling for the door."

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