A fire in Navajo County, Arizona grew to 600 acres on Monday.
The "Phoenix Fire", started around noon on Sunday and is burning north of Highway 260 in the Phoenix Park Wash area.
The area is about about two miles south of Highway 277.
Officials said the fire is wind-driven and is burning grass in the old Rodeo-Chediski burn area.
According to officials, the fire was human caused and is under investigation.
Sixty firefighters from around the state are on the scene, including two hand crews, four engines, one water tender and a dozer.