Firefighters from the San Bernardino County Fire Department, Cal Fire and the U.S. Forest Service responded to the scene near Cleghorn Road shortly before 1 p.m.
San Bernardino National Forest officials announced the closure of the 15 Freeway in both directions at about 2 p.m. Less than an hour later, California Highway Patrol began escorting southbound traffic through the area while the northbound side of the freeway remained shut down.
The fire’s forward progress was stopped after it burned about 15 acres, officials said. No injuries or structural damage were immediately reported.
The cause of the blaze is under investigation.
DEVELOPING: More details will be added to this report as they become available.
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