CAMP PENDLETON, Calif. --
Firefighters spent the day Thursday battling a wildfire at Camp Pendleton.
The blaze blackened at least 400 acres as of 4:30 p.m. and was burning in an area on the base known as Range 409, military officials said.
KNSD-TV in San Diego reported that the area is rugged and relatively remote, but the fire was visible from Interstate 5 in many parts of North County.
Base fire inspector Bill Gick told KGTV-TV in San Diego that the blaze began at about 12:45 p.m. near Roblar Road, in a central area of the Oceanside-area Marine Corps station.
Gick told the station that water-dropping helicopters were being used to fight the blaze.
10news.com: Brush Fire Breaks Out At Camp Pendleton
Firefighters from Cal Fire, the U.S. Forest Service and other San Diego County fire departments responded to the fire.
No structures were threatened, KNSD-TV reported. The cause of the fire is under investigation.
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