RENO, Nev. (AP) — Five aircraft are helping firefighters battle a wildland blaze that forced evacuations in rugged terrain north of Reno.

No structures have been damaged and no injuries reported so far at the brush fire north of Cold Springs near the California-Nevada line. Authorities say it has burned an estimated 12 square miles since it broke out Sunday evening.

There's still no containment. About 75 residences were evacuated early Monday in areas along the Petersen mountain range between Columbia Hill and Chuckwagon roads.

An evacuation shelter has been established at the Washoe County Senior Services center north of downtown.