SAN FRANCISCO (CBS SF) — Firefighters rescued two residents from an intense fire that quickly raced though the top floor of an apartment building in a densely populated Visitacion Valley neighborhood late Saturday night.

The 1-alarm fire was reported just before midnight in a building on San Bruno Ave. Arriving firefighters encountered a structure with its top floor fully engulfed with flames.

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On video posted by the firefighters on Twitter you can clearly hear a radio call of “two victims coming out” while massive flames roar out of the front windows.

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The video also shows a neighbor quickly pulling their car out of neighboring garage as firefighters race by.

Firefighters said the two victims were taken to a local hospital for treatment of their injuries which were described as serious. Firefighters said they may have been suffering from smoke inhalation.

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The apartment was completely destroyed by the blaze which may have been ignited by a stove fire. The conditions of the neighboring homes in the building was not known.