A fire five miles southeast of Mancos began shortly before 6 p.m. Sunday, authorities said.

The fire was burning mostly piñon and juniper trees off County Road 113, a Durango Interagency Fire dispatcher said.

Russell Amidon, who lives about five miles from where the fire burned, said "it exploded."

"It went from a small fire to 20 acres in a matter of about 20 minutes," he said.

Two fire engines from Dolores responded, as well as many local fire engines. One helicopter, three air tankers and a plane responded as well. The aircraft were released by 8:30 p.m.

The dispatcher said she knew of no structures damaged.

Amidon said the tankers were on the scene very quickly, and crews put fire retardant lines around the fire.