Michael Khan, a 30-year-old Markham man, has been identified by York Regional Police as the victim in a suspicious death Monday.

Witnesses told police that an unconscious man was found lying on Stirling Cres., near Denison St. and Aldergrove Dr., just before 5 p.m. on Monday afternoon.

He was rushed to hospital without vital signs, according to York Region paramedics and later pronounced dead.

Police said they received calls that there was a hit-and-run, but are now saying the cause of death has yet to be determined.

“Initially we were investigating this as a hit-and-run but then there were developments that a hit-and-run might not have happened,” said Staff Sgt. Greg Williams.

York Regional Police said a U-Haul truck is a “vehicle of interest” in the investigation.

Const. Andy Pattenden told the Star Tuesday that police are awaiting the results of a post-mortem examination of the victim. He said it’s unclear whether the man’s death is a homicide or the result of a hit-and-run.

Both the major collisions bureau and the homicide unit are investigating.

With files from Alexandra Jones