Crews are battling a wildfire about 20 miles west of Nogales in the Coronado National Forest.
As of Monday evening, U.S. Forest Service officials say the fire is 80% contained.
The 161-acre wildfire started around 4:30 p.m. on Sunday evening. Forest service officials credit the area fire departments for their quick response.
Around 80 firefighters and a helicopter are working to put it out. No homes are threatened. One firefighter suffered an ankle injury.
The cause of the fire is still under investigation. U.S. Forest Service officials believe it's human caused because there was no lightning. They add there's some foot traffic from ranchers, the border and a nearby recreation area.
One of the biggest challenges is the rugged, steep terrain firefighters have to travel to access the fire.
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