Dubuque authorities say a mattress that fell off the top of a vehicle caused a crash that injured a motorcyclist Monday in Dubuque. 65 year old Bruce Durband of Olin, Iowa, was taken by ambulance to MercyOne Dubuque Medical Center for treatment of a laceration near his left eye and a broken wrist. According to Dubuque police, 48 year old Felipe Lopez of Dubuque was traveling west on U.S. Highway 20 Monday afternoon when a mattress that was attached to the top of his vehicle fell onto the roadway. A vehicle driven by 74 year old Judith Towell of Marion, Iowa, was traveling behind Lopez and braked to avoid hitting the mattress, then Durband’s motorcycle crashed into the back of Towell’s vehicle. Durband was wearing a helmet. Lopez was cited with spilling a load onto the highway.