Lawton_Police are investigating the death of a 66-year-old man at the Republic Paperboard company, who was unloading the truck he was driving.
It happened around 7:30 Wednesday evening.
According to police, as the man opened the rear door on his tractor-trailer, a bale of cardboard fell out on top of him, killing him.
State medical examiners were called to the scene.
No one from the plant was initially available for comment.