A 77-year-old man died Saturday night after he drove his truck off Interstate 59 just north of Pearl River and crashed into a fence and a tree, State Police said.

John McKean, 77, of Picayune, Miss., was traveling northbound shortly before 8 p.m. on I-59 in a 1998 Ford pickup truck when, for unknown reasons, his truck began drifting left about three miles north of the La. 1090 exit, said Sgt. Nick Manale, a State Police spokesman.

McKean over-corrected to the right, causing the truck to rotate clockwise and run off the road. The truck struck a fence, overturned and crashed into a tree before stopping more than 100 feet away from the road, Manale said.

McKean, who was wearing a seat belt, suffered fatal injuries in the crash, and was pronounced dead at the scene by the St. Tammany Parish Coroner’s Office, Manale said.

Troop L investigators do not suspect impairment as a cause of the crash, which remains under investigation.