A Guttenberg man was killed when he was struck on his motorcycle by a kayak that became separated from a trailer. The Iowa State Patrol reports 75-year old John Thein of Guttenberg was operating a 1995 Hennessy motorcycle on County Road X26, south of Rossville when the accident happened. A vehicle operated by 69-year old Andrew Wroble of Harpers Ferry was southbound operating a 2001 Ford F-150 and pulling a trailer loaded with kayaks. A kayak separated from the trailer and still airborne struck Thein, fatally injuring him. The accident remains under investigation by the Iowa State Patrol. The State Patrol was assisted by the Iowa DNR.