The Fort Payne fire marshal is investigating a warehouse fire. Firefighters were called to a vehicle fire on Railroad Avenue at 12:35 a.m. Monday. When they got there, they found a commercial building on fire. It took crews two to three hours to get the flames under control. They stayed at the scene for several more hours to prevent any flare-ups. Fort Payne Public Works removed items from inside the warehouse, leaving a pile of burnt clothing outside. The fire marshal said their investigation will last several days.