A fire that quickly went to three alarms scorched about 20 acres of brush, burned an outbuilding and threatened a number of other structures in the Newhall Pass area Thursday afternoon.
The blaze broke out for unknown reasons about 1:40 p.m. in the 23900 block of The Old Road, near Towsley Canyon Road, according to the Los Angeles County Fire Department.
Firefighters were already mounting a ground and air attack on the flames when additional resources, including fixed-wing aircraft, were summoned to the scene, a fire department inspector said.
As of 4:30 p.m., crews had stopped the forward progress of the fire, which had burned about 20 acres and was 20 percent contained. An unspecified number of structures were threatened, a fire department dispatcher said.
The Old Road was closed in the area and a paintball facility was evacuated, according to the sheriff's department. The fire caused traffic to slow on the nearby Golden State (5) Freeway in both directions, but no lanes were closed. No injuries were reported.