A fire at a pellet plant outside Show Low in east-central Arizona has led to the closure of a stretch of U.S. 60.
The blaze broke out Tuesday afternoon at Forest Energy Corporation.
The cause of the fire isn't immediately clear.
Authorities say some businesses near the plant have been evacuated as a precaution.
Air tankers are dropping water on the flames to keep the fire from jumping the road and threatening homes. Businesses in the area have been evacuated.
Show Low fire officials say the blaze is mostly being fueled by scrub oaks and not ponderosa pines.
The town's fire department is being assisted by fire officials from Linden, Lakeside and the U.S. Forest Service.
Forest Energy Corporation manufactures wood fuel pellets, horse and animal bedding and densified wood fire logs, among other products.