SPRAY, OR -- Wildland fire crews continue to battle a large wildfire in Wheeler County. The Alder Creek Fire is burning on the south side of the John Day River, near the town of Spray.

As of Sunday, crews had held the fire’s spread to 1,551 acres. It’s about 20% contained. The Wheeler County Sheriff's Office is in contact with people living in the area for potential evacuations, including one home south of the fire and homes on the north side of the river.

Firefighters and dozers are constructing a fireline down a ridge, into the Solitude drainage. Air resources are also working to support ground crews.

The fire was first reported Thursday and led to the closure of the Muleshoe Campground. Its cause is under investigation.