Updated

A fire at a mobile home quickly spread to nearby brush by Malibu Creek State Park Friday, burning about 25 acres and prompting authorities to evacuate park visitors.

The fire broke out about 3:30 p.m. in a sparsely populated area and was 25 percent contained, Los Angeles County Fire Inspector Darryl Jacobs said.

A man working on his mobile home sparked the blaze, Jacobs said without elaborating.

Authorities evacuated park visitors, and advised residents living east of the park to leave their homes as a precaution.

About 125 firefighters aided by water-dropping helicopters were battling the blaze under favorable wind conditions, Jacobs said.