Firefighters are investigating a vehicle fire in Old Town Saginaw. Saginaw firefighters were dispatched shortly after 10 a.m. on Tuesday, Oct. 17 to Hamilton and Cass to put out a vehicle fire. A truck at River City Tile and Stone was fully engulfed in flames when firefighters arrived. Firefighters at the scene said they do not know the cause of the fire but will review security footage from around the area. The fire remains under investigation.