SAN FRANCISCO (CBS SF) — A two-alarm fire damaged residences on Carmelita Street in Hayes Valley, displacing 11 people and left a firefighter injured Sunday morning, the San Francisco Fire Department said.

Officials said crews responded to a blaze in the 100 block of 69 Carmelita St. at around 3:30 a.m. Arriving crews found smoke streaming out of the third floor of the multi-unit building. A second alarm was quickly called in the halt the spread of the blaze within the structure and to prevent from spreading to other buildings in densely packed residential neighborhood.

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Residences at 77-79 Carmelita St. sustained fire damage, while residences at 99 Carmelita and 661-663 Waller St. were damaged by exposure to the fire, officials said.

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The American Red Cross is assisting the displaced residents.

The fire was contained around 5 a.m. A cause of the fire was still under investigation.

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