BILLINGS, Mont. (AP) — Montana forestry officials say a wildfire fueled by hot, dry, windy conditions off of U.S. Highway 87 East near Lockwood has destroyed one structure.

State officials didn’t say whether the structure was a home or other building.

The blaze was reported Monday afternoon on the Crow Reservation east of Billings. It grew to an estimated 1,500 to 2,000 acres by Monday night as it burned through tinder-dry grass and timber, and it has burned onto some private land in Yellowstone County.

State officials say three heavy air tankers, two single-engine air tankers, three helicopters, and numerous engines are responding to the fire.

There was no immediate word of any evacuation orders.

Montana officials say the fire is believed to be human-caused.