Active shooter at YouTube HQ

Armed law enforcement personnel exit YouTube headquarters, Tuesday, April 3, 2018, in San Bruno, Calif. 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.

(Marcio Jose Sanchez / AP)

Associated Press

April 3, 2018 2:01 PM PT

An active shooting at YouTube’s headquarters in San Bruno sparked panic and a massive police response Tuesday.

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

(Jeff Chiu / AP)

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

(Jeff Chiu / AP)

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

(Jeff Chiu / Associated Press )

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

(Jeff Chiu / AP)

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.

(Jeff Chiu / AP)

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.

(Jeff Chiu / AP)

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

(Jeff Chiu / AP)

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)