Officials say a fast-growing wildfire in southern Oregon has destroyed homes and forced dozens of evacuations.

Fire managers say a blaze erupted near Sprague River around 2 p.m. Sunday and had mushroomed to more than 600 acres by nightfall.

The South Central Oregon Fire Management Partnership says the wildfire burning in the Moccasin Hill neighborhood has destroyed an undetermined number of homes and other structures.

Spokeswoman Erica Hupp says that before sundown, Klamath County sheriff's deputies evacuated more than 100 people from homes along two roads in the area.

She says that the fire is burning through heavy timber and brush. Its cause is under investigation.

The Red Cross says it has set up a shelter at a community center in Sprague River, which is about 25 miles northeast of Klamath Falls.