BERKELEY (CBS SF) — At least one person was injured in a two-alarm fire that burned an apartment in Berkeley Tuesday morning, the fire department said.

The fire burned at a two-story apartment building on the 3000 block of Sacramento St in south Berkeley.

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Berkeley Fire said the department received multiple 911 calls about the fire and firefighters arrive to find a ground unit on fire with heavy black smoke emanating from the burning building.

A second alarm was called and firefighters found a victim in an adjacent room. That victim was taken to a hospital and there was no immediate word on the person’s condition.

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The fire was quickly put under control but there was significant damage to the apartment as well as some damage to an upstairs unit, the fire department said.

The cause of the fire is still under investigation.

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Berkeley police shut down Sacramento St. was shut down between Ashby Ave. and Woolsey St. as firefighters battled the fire and mopped up. Sacramento St has since been reopened.