WARNER SPRINGS (CNS) - The Eagle Fire, which charred 14,100 acres of northeastern San Diego County, was 100 percent contained Saturday, Cal Fire said.

No fire activity was observed and remaining fire crews continued suppression repair, mop-up and patrol of the fire perimeter, Cal Fire said.

More than 2,000 firefighters from several area agencies assisted in battling the blaze, which broke out about 10:40 on July 21, off Eagles Nest Road and Camino San Ignacio, roughly five miles east of Warner Springs, according to the state agency.

The agency began releasing some of its firefighters Friday as full containment neared. Officials said 18 fire personnel sustained injuries battling the blaze.

The cause of the blaze, which destroyed one outbuilding, was arson, Cal Fire said. Officials have declined to release further information about the origin of the fire, pending completion of their investigation.

The cost of suppressing the conflagration, which spread throughout Los Coyotes Indian Reservation and extended into the Anza-Borrego Desert State Park, has reached $15.4 million, Cal Fire reported.

Lost Valley Boy Scout Camp and the Borrego Palm Canyon Campground reopened to the public following a closure forced by the stubborn fire.