RED DEER, Alta. -- RCMP say a man in central Alberta was killed while trying to stop some people from stealing his truck.

Dawson Wegner Cramer, known as D.J., was found injured early Wednesday in an alley behind his Red Deer home.

The 23-year-old died in hospital.

Mounties say Cramer had tried to stop two men from taking his 2001 Ford F-650, a large commercial or cargo truck, when he was struck by the vehicle.

The truck was later found about three kilometres away, where witnesses spotted two suspects running into a wooded area.

Cpl. Hal Turnbull says investigators are trying to determine whether it was a random crime.

"Was it just a crime of opportunity -- saw a truck and decided to get it and he got in the way. Or was it people he knew?" Turnbull said.

"We don't know."