By late Thursday afternoon, the roughly 760-acre fire was about 70 percent contained. Photo: OnSceneTV

Military and civilian firefighters worked in concert for a second day Thursday to subdue a wildfire that has blackened hundreds of acres on the grounds of Camp Pendleton and in the southern reaches of neighboring Orange County.

The blaze erupted for unknown reasons about 6 p.m. Wednesday off Cristianitos Road near San Mateo Campground, at the northwest edge of the Marine Corps base.

The fast-moving flames soon moved into San Clemente, where they threatened homes and an animal shelter, according to Orange County Fire Authority Capt. Larry Kurtz.

Hundreds of firefighters from Camp Pendleton and civilian agencies battled the blaze, dubbed the Cristianitos Fire, through the night.

No structural damage or injuries had been reported as of late this afternoon, by which time crews had the roughly 760-acre fire about 70 percent contained, according to Kurtz.

An estimated three-quarters of the burn area was within the boundaries of Camp Pendleton, said USMC Capt. Brian Capt Villiard, a spokesman for the northern San Diego County military base.

The cause of the fire, which posed no structural threats at the USMC installation, was under investigation, Villiard said.

–City News Service