Tipsheet

Active Shooter Reported at YouTube Headquarters

UPDATE (Matt): NBC News is reporting that a female suspect is dead at the scene. No reports on how many have injured or killed yet.

UPDATE II (Matt): Fox News is reporting that the female suspect shot her boyfriend and several others before committing suicide. 

UPDATE III (Micah): Police held a brief presser around 5:30 P.M. Here are the details:

At 12:46 pm 911 calls were received about gunshots on the YouTube campus. Law enforcement arrived on scene at 12:48 pm. There is one female deceased on scene from what appears to be a self-inflicted gunshot world. It has yet to be confirmed if the deceased individual is the shooter. Four other victims were transported to nearby hospitals and one is said to be in critical condition.

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An active shooter has been reported at the YouTube headquarters in San Bruno, California. The office is currently on lockdown and there is a heavy police presence near the building.

Lavrusik later tweeted that he was "safe" and had been evacuated from the building.

The San Bruno Police are sending out warnings to the community.

Multiple people have been hospitalized, according to officials. 

This is a breaking news story and will be updated.