Ventura County fire officials said the blaze started near Rocky Peak Road and was spotted shortly before 1 p.m. before it quickly grew to 30 acres.
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Fire officials said there was minimal threat to structures.
VCFD officials confirmed shortly before 10 p.m. the fire was 100 percent contained at 45 acres and no injuries were reported.
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Fire crews from Ventura County, Los Angeles County and the city of Los Angeles worked to extinguish the blaze from the ground and air.