The Arkansas Department of Correction reported Sunday night that two inmates at separate ADC facilities died in their single-man cells on Sunday, marking the sixth and seventh deaths in the prison system this year.

All are under investigation. 

ADC officials say the Arkansas State Police is investigating Sunday's incidents in which Joshua Autry, an inmate at the East Arkansas Regional Unit at Brickeys, and Kevin Shelton, an inmate at the Varner Unit in Grady, were both found unresponsive by guards in their single-man cells.

In Autry's case, according to the news release, Brickeys Unit medical staff found no signs of life, and Autry was transported to the unit infirmary. Autry was pronounced dead at 4:22 a.m. Sunday, according to ADC officials.

Autry was a 33-year-old white male serving a life sentence for murder in the 1st degree out of Drew County, according to the ADC.

At Varner, Shelton was found unresponsive by unit staff in his single-man cell, and staff provided emergency medical treatment before transporting him to the unit infirmary, according to ADC officials.

Shelton was pronounced dead at 4:02 p.m. The ADC said Shelton was a 30-year-old black male serving a 20-year sentence for negligent homicide out of Pulaski County.

We are continuing to investigate this story. Please stay with us for more.