MACHIASPORT — Officials say the death of an inmate at the state prison in Machiasport was not a homicide and does not appear to be a suicide.

Stephen McCausland of the Maine Department of Public Safety says the cause of 32-year-old Phillip Kay’s death remains under investigation. An autopsy is scheduled for Monday.

Kay was found by a guard dead in his cell Friday afternoon at the minimum security Downeast Correctional Facility.

Kay was scheduled to be released next year after serving part of a 12-year sentence for an aggravated assault conviction in 2009. Part of the sentence was to be served behind bars and the rest on supervised release.