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A wildfire grew to 90 acres after breaking out in the hills south of Newbury Park Thursday night, firefighters said.

Dubbed the Wendy Fire, it was first reported around 7:30 p.m. in the area of Potrero Road and Wendy Drive, according to the Ventura County Fire Department.

Within half an hour it grew to cover about 50 acres, said fire Capt. Brian McGrath. It was 25% contained Thursday night.

Firefighters were initially having a difficult time accessing the area burning, officials said.

The flames were moving south, farther away from residents in Newbury Park, but McGrath said the an arts center within Point Mugu State Park could be threatened.

Potrero Road was closed between Wendy Drive and Reino Road. People were advised to avoid the area, but no evacuations had been ordered.