WHITE BIRD - Investigators with the Idaho Department of Lands have determined that fireworks caused a wildfire near White Bird in Idaho County.

The fire was reported at 6:50 p.m. Friday, and burned approximately 421 acres in grass and brush. It was 100-percent contained late Saturday afternoon.

An earlier report said the fire was 300 acres in size. That estimate was changed after more accurate mapping of the area.

Crews are mopping up hot spots and securing fire line Saturday evening. Winds have not been a concern, but firefighters have been working in temperatures that reached 108 degrees.

No injuries have been reported, and no structures were damaged.

The fire is in the Idaho Dept. of Lands fire protection area. Cooperating agencies include the U.S. Forest Service, Southern Idaho Timber Protective Association, Salmon River Rural Fire Dept., Idaho County Sheriff, and Idaho State Police.