Crews extinguished a three-alarm, wind-driven brush fire in Pittsburg early Friday morning, according to the Contra Costa Fire District.
At about 1:50 a.m., firefighters responded to a car fire that spread to a hillside on Bailey Road in Pittsburg, ConFire said. The blaze burned about 50 acres.
Crews managed to contain the fire by about 4:30 a.m. then had the flames out before 5 a.m., with no structures involved, fire officials said.
Bailey Road between Bay Point and Concord was shut down in both directions for a few hours but reopened just before 6 a.m.
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The cause of the car fire was still under investigation, fire officials said.