GRAND FORKS, N.D. (AP) — A northeastern North Dakota man has died from injuries sustained when a lawn tractor rolled over on him. The North Dakota Highway Patrol says the crash happened Tuesday about five miles west of Crystal, in Pembina County. Authorities said Saturday that Mark Sagert, of Cavalier, died Friday at a Grand Forks hospital. Authorities say the 62-year-old Sagert was maneuvering the lawnmower over the top of a culvert opening and began to slide, which caused the rollover. Several citizens were able to move the lawnmower off Sagert and he was initially taken to a Park River hospital.