An inmate from Deer Ridge Correctional Institution near Madras unexpectedly died Monday afternoon.

Liz Craig with the Department of Corrections reports the death was caused from a medical issue, not a crime.

The inmate is identified as John Derrick Stafford, 49, who was incarcerated  in March of 2011 for Burglary in the First Degree out of  Marion County.

The Oregon State Police Criminal Investigation Division is conducting an investigation, as with all unanticipated deaths at the institution.