ROLLA, Mo. — Firefighters with the Mark Twain National Forest Service are battling a wildfire in the Mark Twain National Forest south of Cassville, according to the Forest Service. The wildfire is estimated to be at 50 acres and growing, the Forest Service says. The fire is located twelve miles south of Cassville and six miles south of Seligman. Fire crews are utilizing three Forest Service engines, two dozers and the Mark Twain Veteran Crew to fight the fire, as well as a drone to help coordinate the response.