SAN FRANCISCO (CBS SF) – A two-alarm fire that spread to multiple buildings in San Tuesday morning, fire officials said.

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The fire, which began at a home located in the 1500 block of Hudson Avenue, about one block from Third Street, was reported at about 2:30 a.m., fire officials said.

San Francisco Fire Battalion Chief Michael Thompson said one of the homes was vacant and being renovated before the fire engulfed the garage.

“When our crews arrived on scene there was so much flame we didn’t even know there was a carport. We had basically three buildings on fire, two cars fully engulfed, all up on the sidewalk,” he said. “So it actually took recreating this using satellite imagery to find out what was actually on the vacant lot.”

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Thompson said the blaze was put out about 4:14 a.m.

The injured firefighter was transported to San Francisco General Hospital after he fell through a deck suffered a leg injury.

The cause of the fire remained under investigation.

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