BILLINGS, Mont. (AP) — Fergus County officials say a 45-year-old man has died in a one-vehicle rollover about 10 miles north of Lewistown.

Coroner Dick Brown says Anthony "Tony" Sweeney of Lewistown died in the crash shortly after 11 p.m. Tuesday.

The Montana Highway Patrol reports Sweeney was southbound on U.S. Highway 191 when his pickup swerved, struck the guardrail twice and then rolled.

Sweeney was not wearing a seat belt. He died at the scene.

The crash remains under investigation.