Indian Mujahideen on Sunday, July 27 had claimed responsibility to the serial blasts. This is said to be the same group that had sent e-mails after the Jaipur blasts in May 2008. The anti-terrorism squad is investigating the source of the email. Just before the blasts took place, the Indian Mujahideen had sent an e-mail to a TV channel saying that there would be blasts in Ahmedabad. The group had e-mailed video clips to two Delhi-based media organisations of a bicycle which, it said, was purportedly packed with explosives used in the blasts.