A man accidentally shot and killed himself while driving Wednesday afternoon down a Tennessee highway, Chattanooga TV station WTVC reported.

James Anthony McKenzie, 49, shot himself in the thigh with a .45 caliber handgun as he drove, Meigs County Detective Scott Wiggins said. A call came in for deputies to respond to a seizure, he said, but when they arrived McKenzie had apparently bled to death from the wound in his thigh.

The man was in the car alone, according to WTVC, and deputies were trying to determine how the gun discharged. McKenzie held a valid permit for the firearm.