VIDEO: Aerial footage of active shooting situation at YouTube HQ in San Bruno

SAN BRUNO, Calif. (KGO) -- Police say one person is dead of a self-inflicted gunshot, four others were injured in an active shooter situation at YouTube's headquarters in San Bruno on Tuesday.

Sky7 was over the scene, where police have the area surrounded.

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Law enforcement stands watch outside of the YouTube headquarters on April 3, 2018 in San Bruno, California.

Justin Sullivan/Getty Images

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