SAN FRANCISCO (BCN) -- A single-alarm fire damaged an apartment in San Francisco's Potrero Hill neighborhood Friday morning, a fire dispatcher said.

The fire was reported at 10:34 a.m. at a two-story apartment building in the unit block of Turner Terrace, the dispatcher said.

It took about an hour for firefighters to extinguish the blaze. It was declared under control at 11:35 a.m., according to the dispatcher.

He did not know if anyone was injured in the blaze or how much damage it caused to the apartment.

The cause of the fire is under investigation.

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