CHEYENNE, Wyo. (AP) — Firefighters are working to secure containment lines around a 6,000-acre wildfire burning in the Medicine Bow National Forest.

Rain helped slow the growth of the Cow Camp fire on Thursday but extremely high winds could move in Saturday.

Fire managers say crews have now been freed up to work on the most active areas of the fire, which is about 10 percent contained.

Crews have been working to strengthen existing lines and widening some of them.

The fire is burning about 20 miles northwest of Wheatland in mixed ponderosa pine, brush and grass. Lightning is suspected of starting it Sunday.