Police say a 38-year-old man who was killed in a rollover Tuesday evening was not wearing a seatbelt. 

The man was thrown from the vehicle after his car rolled in a ditch on a grid road about 40 kilometres southeast of Wadena, Sask.  

He was pronounced dead at the scene. His name has not been released. 

The passenger of the car, a 28-year-old man, who was wearing a seatbelt, was taken to a hospital in Wadena to be treated for minor injuries. 

Police are still investigating what happened, but say alcohol may have been a factor in the crash.