A 46-year-old inmate of Mandoli Jail here was killed after he was attacked with a broken tile allegedly by his fellow inmate, prison officials said on Sunday.
The deceased, identified as Rajeev Khanna, was loaded in jail 20 days ago in a case of cheque bounce, they said.
According to police, the incident took place on Wednesday morning when Khanna was sleeping inside the barrack.
He was attacked by 26-year-old Vinod Kumar with a portion of a tile taken from outside the barrack, they said.
Other inmates were also present in the barrack when the incident took place, a senior police officer said.
The victim was rushed to a nearby hospital where he died the same day during the course of treatment.
A case was registered against Kumar who was lodged in jail over one-and-a-half years ago on charges of murder, the officer said.
The motive behind the killing is not known yet and a Metropolitan Magistrate is conducting the probe, he said, adding that a post-mortem report is awaited.