Delhi Police claimed the Tihar authorities had not communicated the nicknames of three undertrial prisoners - including Paras Goldy, who was killed in the gang war yesterday - in the three particular production programmes received by them in June.
Tihar authorities, however, refuted all allegations.
According to the police, the prison authorities are supposed to include nicknames of undertrial prisoners in production programmes, which are sent to the police before inmates are to be transported to and from courts for hearings.
Tihar authorities, however, maintained that if the prisoner nicknames are mentioned in the warrant, which is forwarded to the jail authorities when an accused is sent to judicial custody, then it is clearly specified in the production programmes.
"If nicknames are not mentioned in warrants, no amendments can be done by the prison authorities on their own," Mukesh Prasad, DIG (Prisons) Tihar, said.