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.
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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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