TOMAH, Wis. -- An investigation is underway into the discovery of a badly decomposed body at a Tomah motel.

The body of 51-year-old Kurt Lieburn was found February 3 at the Park Motel.

Tomah Police Chief Wes Revels tells News 8 Lieburn's body was found in a room, and the death appears to be from natural causes.

Revels says motel staff was going to do repairs in the room that had not been occupied for a while when they found Lieburn's body.

Family reported Lieburn missing in March 2011.

Sources tell News 8 the body was so badly decomposed investigators could not initially tell if it was a man, or a woman.

Torkelson Funeral Homes in Tomah handled services for the Lieburn family.