PRINCETON- A Missouri man was injured in an accident just before 9 p.m. on Tuesday in Mercer County.

The Missouri State Highway Patrol reported a 2002 Ford F250 driven by Nathan P. Allen, 38, Trenton, was southbound on U.S. 65, just south of Mo. 136. The vehicle ran off the right side of the road, struck a retaining wall, and went airborne and overturned.

Medical Air transport flew Allen to Iowa Methodist Hospital in Des Moines.

The MSHP reported he was not wearing a seat belt.