It’s been a big day for… Listening to...

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It’s been a big day for… Listening to...

UPDATE: Woman shooter injures at least four, unconfirmed number dead at YouTube head office

Reported that she shot her boyfriend before shooting herself.

The active shooter at the YouTube in San Bruno, California, head office has been identified as a woman according to Fox News.

Four people have been injured and taken to hospital and an unconfirmed number dead.

According to witnesses speaking to KTVU in the US and quoted by Fox, the shooter has reportedly also shot her boyfriend and then herself.

Fox News report she was an adult white female.

“It did not stop. There was no mercy,” a witness told Fox News.

Product Manager Todd Sherman live Tweeted his experience:

“First thought was earthquake. After exiting the room we still didn’t know what was going on but more people were running,” he wrote.

“Seemed serious and not like a drill. We headed towards the exit and then saw more people and someone said that there was a person with a gun. I looked down and saw blood drips on the floor and stairs. Peaked [sic] around for threats and then we headed downstairs and out the front. Police cruisers pull up, hopped out with rifles ready and I told them where the situation was as I headed down the street to meet up with a couple team members.”

More information as the story unfolds.