Amar Dev Singh, lodged in barrack number 6, was found lying unconscious. A doctor was immediately summoned to the prison."After checking Amar Dev's pulse, the doctor declared him dead," Jail Superintendent Nand Kishore Singh said.
The body has been sent for post mortem examination, he said.
The deceased, a resident of Haldi police station area, was serving life sentence since 2009 in a murder case.