SIOUX FALLS, S.D. (KELO) — A 30-year-old state prison inmate has died.

The South Dakota Department of Corrections says Jordan Ward was found unresponsive in his cell. Efforts to revive Ward were unsuccessful.

The death is currently under investigation.

Ward was serving sentences for 1st-degree burglary, accessory to a crime and possession of a controlled substance out of Brown County.