WARREN, Maine (AP) Police are investigating the death of a 28-year-old inmate at a Maine prison.

The Corrections Department says Dana Bartlett, of Lewiston, died shortly before 6 p.m. Sunday at the Bolduc Correctional Facility in Warren.

A suspected cause of death was not released.

The Corrections Department said that, consistent with the its policy and Maine Attorney General’s Office protocols, the Maine State Police and the Office of Chief Medical Examiner were notified.

Bartlett was sentenced in March to 16 months in prison for operating after habitual offender revocation and theft by unauthorized taking. He was scheduled to be released on March 28, 2019.