STEELE, N.D. — Authorities say a 40-year-old Bismarck man died after suffering a heart attack while driving on Interstate 94 and crashing his car.

Robert Eichele’s car went in the ditch about 6 miles west of Steele, shortly before 12:30 p.m. Saturday. The vehicle then went through a fence and into a field, where it came to rest.

Eichele was pronounced dead at a Bismarck hospital. He was alone in the vehicle.