Reuters, New Delhi :India’s Supreme Court commuted death sentences on three men for involvement in the killing of former prime minister Rajiv Gandhi to life imprisonment on Tuesday becauseof an 11-year delay in deciding on their petitions for mercy.Rajiv Gandhi was killed by an ethnic Tamil suicide bomber while campaigning in an election in the southern Indian town of Sriperumbudur in May 1991.The three Indian men – tried as Santhan, Murugan, Perarivalan – were members of a Sri Lankan ethnic Tamil separatist group, the Liberation Tigers of Tamil Eelam (LTTE), and Gandhi’s killing was seen as an act of retaliation after he sent Indian peacekeepers to Sri Lanka in 1987.The three were convicted of involvement in 1998 and sentenced to death by hanging. A fourth person, a woman, was also given the death sentence but it was later commuted to a life term.The men appealed for mercy but successive Indian presidents gave no decision until 2011, when their plea was rejected.”Delay in deciding mercy pleas is one of the grounds to commute the death sentence to life imprisonment,” the Supreme Court, headed by Chief Justice P. Sathasivam, said.