A Maryville man was killed Thursday after his lawnmower filled on top of him when the mower slid into a retaining pond at a business on William Blount Drive, according to the Blount County Sheriff.

Sheriff James Berrong said a witness found 54-year-old David Lahrs and called for help.

Lahrs was deceased at the scene, Berrong said.

The incident has been ruled an accident.