BENSON, Ariz. — Authorities say the cause of a wind-driven wildfire that has charred about 3 square miles (8 square kilometers) in southeastern Arizona remains under investigation.

Fire officials say the human-caused fire started shortly before noon Saturday on a ranch and grew in a sparsely populated area of rural Cochise County.

It is burning grass and brush on private ranch land and part of the Coronado National Forest, about 20 miles (32 kilometers) east of Benson.

There’s no report of any injuries or structures burned.

But the Sheriff’s Office issued evacuation notices Saturday afternoon to an area between St. David and the Dragoon Mountains and pre-evacuation notices to the Cochise Stronghold areas in the Dragoons.

About personnel still were battling the wildfire on Sunday.

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