By CBSLA Staff

PINYON PINES (CBSLA) — Firefighters on Sunday were battling a fire that had grown to some 400-acres in brush near Pinyon Pines, which has spurred mandatory evacuations for Pinyon Crest.

There are approximately 400 firefighters on the scene. Two homes have been destroyed so far, with three additional homes damaged and three outbuilding damaged as well.

READ MORE: Lifeguards Battle For Bragging Rights In Hermosa Beach

One firefighter has suffered an injury and has been transported for medical evaluation.

(credit: San Bernardino National Forest)

The so-called Flats Fire was reported just after 11 a.m. west of the Pinyon Flat campground in the Santa Rose and San Jacinto Mountains National Monument.

An evacuation warning had also been issued for Pinyon and Alpine Village, authorities said.

The fire also prompted the closure of Highway 74 between Palowet and Ribbonwood drives. The fire was at 0 percent containment.

READ MORE: Business Taking New Precautions As COVID Cases Surge

SoCal Air Operations reports that there are more than 10 firefighting aircraft assigned to the Flats Fire in Pinyon Pines.

MORE NEWS: Joseph Jimenez Charged With Murder, Attempted Murder In Corona Movie Theater Shooting

This is a breaking news story. More information will be added as soon as it becomes available.