The Natrona County Sheriff's Office is leading the search for a man who was reported missing last week.

John Barnhill was reported missing late Tuesday, according to Sgt. Sean Ellis. Authorities found Barnhill's vehicle in the area of Sheepherder's Hill on Saturday night.

There is no evidence of foul play nor any reason to think Barnhill may be in physical danger, Ellis said. However, there is some concern regarding Barnhill's medical condition.

Ellis said Barnhill had not returned to his truck since Tuesday.

Anyone with information regarding Barnhill's whereabouts is asked to contact the Natrona County Sheriff's Office at 235-9282.

A photograph and physical description of Barnhill was not immediately available Sunday afternoon.