By The Associated Press

Authorities say a wildfire was burning along the Arizona-Mexico border about 20 miles southwest of Sierra Vista and has charred about 1,200 acres so far.

The Cochise County Sheriff's Office says "School Canyon Fire" was reported Tuesday morning in the Montezuma Pass area.

It's unclear how the fire started.

The fire was burning grass and brush in the Coronado National Forest and was moving north toward the Parker Canyon Lake area.

Sheriff's officials were evacuating Lakeview campground at Parker Canyon Lake, but said no structures were immediately threatened.

Six air tankers, two helicopters, four water tankers, 12 engines and two 20-person crews have been assigned to the fire so far.