NEW DELHI - India is bracing up for a scenario where Pakistan will demand extradition of people behind killing of its 60 citizens on Indian soil, post the National Investigating Agency (NIA) finding evidence of a Hindu terror module being involved in the 2007 Samjhota Express blasts, reported Indian media on Thursday. Sources confirmed that the NIA has found evidence of the role of Swami Aseemanand in the explosions that killed 68 people, 60 of which were Pakistanis. The Indian government fears that Pakistan may even demand extradition of Swami Aseemanand," a source said. The NIA claimed evidence against Aseemanand, a day after Indian Home Minister P Chidambaram said the NIA had made progress in the probe. Citing similarities between the locking mechanisms used to arm the bombs in the Mecca Masjid blast and the Samjhota blasts, sources say it is confirmed the same Hindutva terror module is behind both blasts. Sources said the NIA is now probing how the Hindutva terror module managed to make "highly sophisticated" bombs, placed on the Samjhota Express. "But it is clear that no Islamist militant group is behind the blasts," a source said.