There were six men who had committed the crime, but Ram Singh, the bus driver, committed suicide and a juvenile accused was released after spending three years in a reform home.
Four of the men were hanged on Friday in Tihar Jail at 5:30am for the crime that had sparked widespread protests across the country.
Three death-row convicts on Thursday evening rushed to the Delhi High Court to appeal against their execution scheduled less than 10 hours later.
Convict Mukesh Singh had moved the Supreme Court earlier in the day claiming he was not in Delhi when the crime took place on December 16, 2012.
Jail officers said that on Wednesday they carried out dummy executions inside phansi kotha( hanging courtyard) and inspected the hanging courtyard inside jail 3 again on Thursday morning.
Tihar jail officials said Pawan Jallad will carry out a dummy execution on Wednesday.
The petition, filed through the convicts’ lawyer AP Singh, also said that the four — Vinay Sharma, Pawan Kumar Gupta, Akshay Singh and Mukesh Singh — have not yet exhausted all their legal remedies.
The Patiala House Court on Monday deferred the hanging of the convicts in the Nirbhaya rape case till further notice, the third such delay of a scheduled date
The mother of the 23-year-old woman, who has been present in courts for all hearings in the case, said she will not be relieved until the men who raped and killed her daughter are hanged.
Pawan Gupta’s lawyer A P Singh had filed the mercy plea shortly after the Supreme Court dismissed the convict’s curative petition Monday morning.