CAVE CREEK, Ariz. (AP) - A grass and brush fire on national forest land on the northeastern outskirts of metro Phoenix has forced the mandatory evacuation of some camping grounds.
But authorities say the blaze continues to burn away from communities in the Phoenix suburb of Cave Creek.
Tonto National Forest officials said Sunday that the fire has grown to more than 11.2 square miles (18 kilometers) with no containment yet.
It's burning about 8 miles (13 kilometers) east of Cave Creek.
Authorities say they believe the fire is human-caused, but they haven't released any details.
No injuries or structure damage have been reported.
More than 240 firefighters are battling the blaze along with air tankers dropping slurry and helicopters dipping water out of Bartlett Lake to drop on the flames.