LINCOLN, Neb. (AP) — A 74-year-old man serving a life term has died in a Lincoln prison.

State prison officials say Elijah Jones died just after 4 p.m. Monday at the Nebraska State Penitentiary in Lincoln.

Officials have not said what caused Jones’ death, but acknowledged that Jones was being treated for a long-term medical condition.

Nebraska law requires a grand jury investigation anytime someone dies in state custody.

Jones had been in the prison system since 1983, when he was convicted of first-degree murder for the 1979 shooting death of Elijah Kelly in an Omaha club.