Fire breaks out in Kearny Mesa office building

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SAN DIEGO — A sprinkler system and quick response by firefighters limited damage from a fire to an office building Saturday in San Diego, authorities said.

At about 5:15 p.m. a  passerby noticed flames coming from the side of a building at 9449 Balboa Avenue, fire officials said. It went to a second alarm at 5:31 p.m. and the flames were out within 20 minutes.

Fire damage was confined to the third-floor exterior deck and water damaged a couple of law offices next to the deck, firefighters said.

No injuries were reported, they said.

The fire was caused by discarded smoking materials, officials said.