The four death-row convicts in the Nirbhaya case are likely to be shifted to Jail No. 3 in Tihar on Friday, where their execution will take place on January-22, a senior-jail-official said. The Tihar Jail authorities have written to the Uttar Pradesh prison authorities, seeking the services of two hangmen from the state to execute the four convicts in the 2012 Nirbhaya gangrape-and-murder case.