According to reports immediately following the blasts , responsibility for the bombings was claimed by the Harkat-ul-Jihad al-Islami ( HuJI ) group . In an email attributed to HuJI , the group is alleged to have demanded that Mohammed Afzal Guru , convicted for the 2001 Indian Parliament attack , should not be hanged as ordered by the Supreme Court . However , Afzal Guru strongly denied any such link to the attack , and said that his name was being " unnecessarily " dragged into the " cowardly act " which " must be condemned by all "
2001 Indian Parliament attack
2001 Indian Parliament attack
2011 Delhi bombing