https://www.cnet.com/news/heres-what-we-know-about-the-shooting-at-google-san-bruno-youtube-hq/

A suspected female shooter was found dead inside YouTube's San Bruno, Calif. headquarters Tuesday after an active emergency erupted in the quiet Silicon Valley town.

YouTube employees began posting to Twitter about a shooting around 1 p.m. PT. They described a chaotic scene that was brought under control by law enforcement.