Yuma County Sheriff's Office is investigating an off-road crash involving a RZR side-by-side that was traveling in the Fortuna Wash.

The accident occurred late Thursday afternoon. The driver of the off-road vehicle topped an incline and then drove off a cliff with a 35-foot drop. The 60-year-old man driving the RZR was transported to a Phoenix hospital with major injuries. A 51-year-old woman passenger sustained minor injuries and was treated at the scene. According to YCSO, alcohol does not appear to be a factor in the crash.