PATEROS, Okanogan County — Approximately a dozen houses and cabins were under an evacuation order this morning because of a fast-moving wildfire in northcentral Washington, officials said.

The Squaw Creek fire, about eight miles northwest of town, was estimated at 1,400 acres, said Robin DeMario, spokeswoman for the Okanogan and Wenatchee National Forests.

Firefighters will construct fire lines and protect structures today, she said.

One structure was destroyed, apparently an unoccupied residence of some kind, said Okanogan County emergency manager Scott Miller. No injuries had been reported.

Four tractor-dozers, two 20-person firefighting crews from both the state and the U.S. Forest Service, and about 40 engines were deployed as of Friday and more were expected, DeMario said.

More than 150 firefighters were assigned to the fire, she said.

The fire, burning on mountainous terrain, grass, brush, and in orchards, started on private land and moved toward national forest land, DeMario said. It had burned down into the Squaw Creek Drainage and was moving in a northerly direction toward Hunter Mountain today.

The cause of the fire remained under investigation.