Active shooter at YouTube HQ

Officers stand in front of a YouTube sign near offices in San Bruno, Calif., Tuesday, April 3, 2018.

Workers walk down a street near the YouTube complex in San Bruno, Calif., Tuesday, April 3, 2018.

A police officer runs past a YouTube sign near the company’s complex in San Bruno, Calif., on April 3, 2018.

Officers stand by an entrance at the YouTube complex in San Bruno, Calif., Tuesday, April 3, 2018.

Burlingame Chief of Police Eric Wollman, left, hands a dog named Kimba to a man who wished to remain unidentified but said he worked for YouTube, outside the company’s headquarters, in San Bruno, Calif., Tuesday, April 3, 2018. A woman opened fire at YouTube headquarters Tuesday, setting off a panic among employees and wounding several people before fatally shooting herself, police and witnesses said.

Carl’s Jr. workers and others sit in a shopping center parking lot near YouTube’s offices in San Bruno, Calif., Tuesday, April 3, 2018.

Officers run toward a YouTube office in San Bruno, Calif., on Tuesday.

Officers walk near a YouTube office in San Bruno, Calif., Tuesday, April 3, 2018. Police in Northern California are responding to reports of a shooting at YouTube headquarters in the city of San Bruno. (AP Photo/Jeff Chiu)  (Jeff Chiu / AP)

YouTube’s headquarters in San Bruno.