Responsibility
The Islamist "Indian Mujahideen" sent an e-mail to all major TV channels, informing them of the blasts just after the first one occurred. In the case of the bomb blasts in Jaipur, and Ahmedabad, e-mails were sent before the blasts.
Indian Mujahideen strikes back once more. Within 5 minutes from now... This time with the Message of Death, dreadfully terrorising you for your sins. And thus our promise will be fulfilled. Inshallah...Do whatever you want and stop us if you can.
The email was sent from Arbi Hindi. The email threatened nine blasts. A 13-page attached document depicts photographs of the previous blasts under the caption "our jihad". The Delhi blasts are, according to the email, a direct reaction to the raids carried on and after the Ahmedabad blasts, and "harassments imposed by your (Indian) ATS and the police on the innocent Muslims". The document also mentions Amarnath dispute, violence against Christians in Orissa, Babri Masjid demolition and Gujarat riots.
The email was traced to Chembur, an eastern suburb of Mumbai. Mumbai's anti-Terrorism squad (ATS) confirmed that WiFi of the owner firm "Kamran Power" was hacked and used for sending the mail.
Reports claim that the Indian Mujahideen called this operation "Operation B-A-D", encompassing the Bangalore, Ahmedabad and Delhi Bombings. Intelligence officials had intercepted a call made "from the across the border" claiming "Operation BAD is successful", after the Ahmedabad blasts, which the Gujarat police that interpreted as Bangalore, Ahmedabad, Delhi, though the dates and specific places were not known.
Read more about this topic: 13 September 2008 Delhi Bombings