The deceased, identified as Ramdhar Bhatra, was a resident of Daspai Guda village under Kodinga police station limits in Nabarangpur district.
As per reports, Bhatra was lodged in Nabarangpur sub-jail here on January 22 in connection with a rape case.
He was reportedly not in good health for last few days.
On Monday morning, Bhatra's health deteriorated following which he was rushed to the District Headquarters Hospital (DHH) here for his treatment.
However, he was declared dead by the doctors at the DHH late last night.
On being informed, Nabarangpur Town police reached the spot and started a probe into the matter.
Notably, an undertrial prisoner, identified as Sridhar Das, died at a hospital in Puri on Sunday. He was lodged in Puri district jail.
However, Sridhar’s wife Sabita Das had alleged that her husband was beaten to death in the jail and lodged a complaint at Ramachandi police station in Puri in this connection.