Firefighters extinguish two-alarm grass fire

HERCULES, Calif.

About half a dozen crews were still on the scene at 4 p.m. mopping up a few smoldering spots, Contra Costa County fire Battalion Chief Bob Atlas said.

Fire personnel believe a construction worker using cutting equipment to demolish homes in the area unintentionally sparked the blaze this afternoon.

The flames did not threaten any structures, and no injuries were reported.

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