Arizona State Forestry officials say an abandoned campfire is the cause of a wildfire burning north of Payson.
Approximately 120 firefighters and other personnel are assigned to the so-called "Reservoir Fire" that has burned 138 acres of Ponderosa pine and grass.
The fire started Monday morning near the Blue Ridge Reservoir.
Crews are conducting burnout operations and officials say the fire is expected to stay within its current perimeter.