GRADY, Ark. (AP) - Arkansas prison officials are investigating the death of an inmate.

Arkansas Department of Correction spokesman Solomon Graves says Rodney Weston was found unconscious in his cell about 8 a.m. Monday by staff at the Varner Unit in Grady, about 70 miles southeast of Little Rock.

Graves says correction department staff began emergency medical treatment, but 36-year-old Weston died at the prison.

Graves says Arkansas State Police are investigating the death, and the department will conduct a separate internal probe.

Weston was serving a life without parole sentence on a capital murder conviction out of Chicot County.