PAYSON, Ariz. (AP) -- Hotshot crews, air tankers and helicopters are battling a fire in Arizona's Tonto National Forest.
The Sunflower blaze was first spotted Saturday morning. By Sunday morning, it had grown to nearly 4 square miles, or about 2,500 acres.
Tonto National Forest spokesman David Albo says the fire about 20 miles south of Payson has been moving in a northeasterly direction and primarily toward a wilderness area.
Smoke is visible from Phoenix, but no structures are threatened by the fire and it has not prompted any evacuation orders.
Authorities have not yet determined a suspected cause of the fire.
About 140 people have been assigned to fight the fire along with six air tankers and two helicopters. Another 15 engines have been ordered.