Police were called to I-41 northbound near Highway 15 for a reported crash involving two semi trucks.
According to the Grand Chute Fire Department, investigators believe that a northbound truck struck a concrete barrier, causing the the trailer axles to detach and hit another semi truck also traveling north on I-41.
During the crash, one of the trucks slid along the interstate, causing sparks that set its load of paper bales on fire. That truck was destroyed by the fire.