RAWLINS, Wyo. (AP) — Firefighters have made some progress on a growing wildfire burning in south-central Wyoming's Carbon County.

The Ferris Fire about 30 miles northeast of Rawlins had burned 8,797 acres by Sunday afternoon and was 57 percent contained. Fire managers say it is burning through grass, sagebrush and timber in very steep, rugged terrain, as well as in flat areas.

The cause of the wildfire, which was first reported July 27, remains under investigation.