ASHEVILLE, N.C. — After spotting smoke billowing up from a mountain in Leicester, firefighters battled a 70-acre wildfire March 31, the source of which is still under investigation. Firefighters with the Leicester Volunteer Fire Department saw the smoke from the station before any 911 calls came in, and they went out to investigate around 1 p.m., according to Interim Deputy Fire Chief Roger Banks. About 70 crew members from the volunteer department, in addition to firefighters from nine other departments in Buncombe and Haywood counties, helped suppress the fire. “We know about where it started, but we don’t know what started it,” Banks said. The interim deputy said they don’t usually investigate wildfires, but the N.C. Forest Service is looking into the cause of the wildfire.