PETALUMA (CBS SF/BCN) – A one-alarm fire in Petaluma early Thursday morning resulted in one person being hospitalized with smoke inhalation, fire officials said.

The fire was reported at 3:24 a.m. in the 1400 block of Technology Lane, where crews arrived to find a mattress fire in a unit on the third floor of a three-story building, according to the Petaluma Fire Department.

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The flames had been mostly extinguished by the unit’s automatic sprinkler system, and firefighters brought it under control within 15 minutes.

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The person suffering from what fire officials called “mild” smoke inhalation was taken by ambulance to a hospital for evaluation. No other injuries were reported.

The cause of the blaze is under investigation and it caused an estimated $15,000 in damage, according to the Fire Department.

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