BETHLEHEM (AP) — Authorities in Lehigh County are investigating the death of a 21-year-old county jail inmate.

Jarrett Deemer was found unresponsive in his cell at the county corrections center early Sunday and was later pronounced dead at a hospital.

An autopsy was scheduled for Tuesday.

Deemer was serving time for a probation violation stemming from theft and drug charges.

The Lehigh County district attorney’s office is investigating.

He had a driving under the influence charge in Carbon County in 2016.