New Delhi: India may become a party to a lawsuit filed in a US court by the relatives of two US citizens, Rabbi Gavriel Noah Holtzberg and his wife Rivka, who were killed during the November 2008 Mumbai terror attacks. Sources say India may provide evidence in the Brooklyn Federal Court in New York, apart from dealing with the Mumbai attack issue at a government-to-government level.The relatives of Holtzberg and Rivka had filed a lawsuit in November 2010 against Pakistan's ISI and the Lashkar-e-Toiba in a US court. The lawsuit accused the ISI of aiding and abetting Lashkar terrorists in killing 166 people in the 2008 Mumbai attacks, including six Americans. The New York court had even issued a summons to senior ISI officials and Lashkar-e-Toiba leaders.Their lawsuit is largely based on the involvement of Pakistani-American David Headley who has pleaded guilty to plotting the attacks with LeT.Holtzberg and Rivka who originally were from Brooklyn in the US and were killed when the attackers entered the Chabad Lubavitch Centre in November 2008. They were slaughtered in front of their two-year-old son Moshe, who was rescued by his nanny Sandra Samuel.India is likely to rely on Pakistani-Canadian Tahawwur Hussain Rana and Headley's statements who according to a report in Globe and Mail are likely to implicate ISI as they believed themselves to be working for the Pakistani spy agency while they carried out the recce for targets in Mumbai.Federal Bureau of Investigation (FBI) agents in Illinois arrested Rana and his Headley, and accused the two Pakistani expatriates in their 50s of doing surveillance on behalf of LashkarHaving turned FBI informer in a bid to escape the death penalty, Headley is leikely to reveal the blow-by-blow of the Mumbai massacre surveillance scheme when he gives evidence against Rana, the Globe and Mail reported.That testimony should include the specifics on how Headley anglicized his Pakistani name, cultivated ties with Lashkar, videotaped sites in Mumbai, and briefed his handlers in Pakistan in the run-up to the 2008 carnage.Speaking about how he entered India under a "false flag" to scout out targets, Headley told the grand jury that "I told (Rana) about my assignment to conduct surveillance in Mumbai. … I explained to him that the immigration office would provide a cover story for why I was in Mumbai."Around 28 foreign nationals were killed amongst the 166 people in the attack that started on the night of November 26, 2008 and lasted for over 60 hours. The attack, carried out by 10 Pakistani terrorists belonging to Lashkar-e-Toiba, strained India's relation with Pakistan and led to suspension of all bilateral ties.Only one of the attackers, Mohammad Ajmal Amir Kasab, was arrested alive and has been sentenced to death in the case.