CLARKSVILLE, Tenn. (AP) - Authorities in Montgomery County, Tenn., are investigating the death of an Oklahoma man who was found hanged in his jail cell.

Sheriff's spokesman Ted Denny says deputies found Jay Frederick Smith of Broken Arrow, Okla., during a routine security sweep of the jail at 2:09 p.m. Sunday. Jail officials say he hanged himself using a sheet.

An arrest warrant says Smith, a truck driver, was arrested Saturday about 4:30 a.m. on Interstate 24 while traveling west from Nashville.

The warrant says another truck driver reported that Smith's truck almost ran four cars off the road. A sheriff's deputy said in a report that he smelled an intoxicant coming from the 53-year-old Smith, who allegedly failed three field sobriety tests.

Smith's body was taken to the Medical Examiner's Office for an autopsy.