<p>Police said</a> they were responding to an active shooter at a YouTube building in San Bruno, California, on April 3.</p><p>Videos shared on social media showing people fleeing the area. People both inside the YouTube building and neighboring buildings were reportedly placed on lockdown.</p><p>This footage shows a number of emergency vehicles and personnel surrounding the building and civilians moving clear of the area. The uploader also streamed live on Facebook</a> for more than an hour-and-a-half. That video includes footage of police and other emergency responders rushing into the building and people being evacuated with their hands above their heads. Credit: Semir Velikarnadsky via Storyful</p><br />
