A 35-year-old Casper man and a 45-year-old Lusk woman were killed when the car they were riding in ran off Interstate 25 about five miles south of Wheatland Tuesday morning.

Wyoming Highway Patrol Sgt. Jeremy Beck says Shane M. Moser, 24, of Casper, was driving north on I-25 around 7:49 a.m. ​when he drifted into the median near the Highway 34 interchange.

Moser's car vaulted between the north and south bridge decks, striking the west side of the north bridge deck, and landed below on Highway 34.

Moser and his front seat passenger, 26-year-old Ashley B. Walll of Casper, were wearing their seat belts and were taken to Platte County Memorial Hospital in Wheatland for their injuries.

David J. Cunningham and Andrea Garner were unbuckled in the back seat and died at the scene.

Beck says driver fatigue is being investigated as a possible contributing factor.

​​