Georgia prison officials are investigating the deaths of two inmates found unresponsive in their cells on the same day.

A Georgia Department of Corrections statement Wednesday said Demitri Carter was found unresponsive in his cell at Phillips State prison in Buford at 2:10 p.m. on Sunday. Prison medical staff tried unsuccessfully to revive him, and he was declared dead at 2:50 p.m.

Carter, 25, had been sentenced to prison in 2014 for aggravated assault.

James Wheeler, 39, was found unresponsive at Wilcox State Prison and pronounced dead at 7:50 a.m. He was serving time for robbery and theft.

Corrections officials say both inmates apparently killed themselves, but provided no details. Corrections spokeswoman Gwendolyn Hogan said she couldn't provide more information because the deaths are under investigation.