An employee of Sims Brothers, 512 Plumvalley St., uses a crane to pick up metal debris as firefighters of the Bellefontaine Fire and EMS Department try to extinguish a fire started by an explosion around 3 p.m. Monday. Firefighters, who were on scene for two hours and 40 minutes, do not know what cause scrapped objects to explode and catch fire. (EXAMINER PHOTO | JOEL E. MAST)