MOOSE LAKE, Minn. — A 39-year-old inmate at a correctional facility in Moose Lake died on Tuesday morning. A cellmate reported to staff around 10:40 a.m. that the man was unresponsive in their room, the Department of Corrections said. Staff attempted to start life-saving measures, but the man died.

The Minnesota Department of Corrections (DOC) said the 39-year-old man died despite life-saving efforts from staff. The incident is still being investigated. The Midwest Medical Examiner's Office is working to determine what caused the man's death.

A 39-year-old man incarcerated at the Minnesota Correctional Facility in Moose Lake died Tuesday, authorities said. In a news release Wednesday, the Minnesota Department of Corrections said its investigating the man's death in coordination with the Midwest Medical Examiner's Office.

The death of a 39-year-old inmate at the Moose Lake prison is under investigation, according to the Minnesota Department of Corrections. (Vince Tuss/The Minnesota Star Tribune) Authorities are investigating the death of a 39-year-old inmate at the Minnesota Correctional Facility in Moose Lake,