Firefighters Sunday knocked down a fire at a vacant single-story commercial building in Buena Park.

Firefighters dispatched at 8:27 a.m. to the 7200 block of Orangethorpe Avenue had the blaze out at 8:49 a.m., the Orange County Fire Authority reported.

No injuries were reported.

The blaze caused $40,000 worth of damage to the structure. The cause of the fire was under investigation.

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