RCMP are calling the disappearance of a Vulcan man very suspicious.

Otto 'Bunty' Loose, 77, was last seen Sunday afternoon at a Petro Canada gas station in the town located roughly 127 kilometres south of Calgary.

His 2008 Red GMC Acadia has since been found in southwest Calgary on Lakeview Drive and is now being examined for forensic evidence by Calgary police.

Officials are looking for help from the public, but will not disclose why they think the situation is suspicious.

Loose is described as about five foot seven inches tall, 150 pounds with blonde, greying hair and was wearing an off-white jacket and blue jeans. He also suffers from chronic obstructive pulmonary disease and requires an inhaler.