JAMESTOWN, N.D. -- A Little Falls, Minn., man died Tuesday night after suffering a medical condition while hauling cattle in North Dakota.

The North Dakota Highway Patrol said Gregory Anderson, 63, was driving a 2004 Peterbilt semi-trailer loaded with cattle from Jamestown to Aberdeen, S.D.

Shortly after starting his trip at about 7 p.m., Anderson suffered a “sudden medical condition” about 2.5 miles east of Jamestown and drifted off the highway into a field, the patrol said. A short time later, two motorists saw the truck off the road and found Anderson unconscious and called 911. A Stutsman County Sheriff’s Deputy and patrol troopers and Jamestown Ambulance responded. Anderson was taken to Jamestown Regional Medical Center where he was later declared dead.

There was no damage to the truck or cattle, the patrol said, and the incident remains under investigation.