Fire crews in California battling massive wildfire northeast of Los Angeles

GLENDORA, Calif. -- California firefighters are battling yet another massive wildfire just northeast of Los Angeles.

The fire is at the San Gabriel Mountains.

As of Monday, nearly 4,000 acres have burned and more than 1,000 campers and residents have been forced to evacuate the area.

Officials have not released any details on how the fire may have started.

So far, no injuries have been reported.