The execution of convicts in the 2012 Nirbhaya gangrape and murder case will be the first time post Independence that four men are hanged to death together.
Sixteen convicts have been executed in the country in the past three decades, including Yakub Memon, Afzal Guru and Ajmal Kasab.
On February 9, 2013, Afzal Guru was executed in Tihar jail. Guru was convicted in the 2001 Parliament attack. No execution has taken place in Tihar since Guru.
In 1989, former prime minister Indira Gandhi's assassin Satwant Singh and co-conspirator Kehar Singh were hanged in Tihar Jail.
There has also been a dual hanging in the