Gunshots were reported at YouTube headquarters in California on Tuesday as police rushed to the scene.

People on social media indicated that ambulances were arriving and nearby offices were on lockdown. Many claimed there was an “active shooter,” but police did not immediately confirm it.

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Miles⁶
@KXCMiles
Gunshots at the @youtube office in San Bruno. My office across the street is on lockdown.

12:54 PM – Apr 3, 2018
133
97 people are talking about this

huebdoo
@huebdoo
Active Shooter at YouTube, ambulances arriving

12:58 PM – Apr 3, 2018
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26 people are talking about this

Vadim Lavrusik

@Lavrusik
Active shooter at YouTube HQ. Heard shots and saw people running while at my desk. Now barricaded inside a room with coworkers.

12:57 PM – Apr 3, 2018
7,252
11.8K people are talking about this

Authorities in San Bruno said on Twitter that there was police activity at 901 Cherry Ave., where the company’s campus is located. They advised the public to “stay out of the area.”