The attacks have come a week after the Intelligence Bureau wrote to the Delhi Police saying Delhi could be next in line after the terrorist strikes in Jaipur and Ahmedabad. Immediately after the blasts, some news channels received a mail from the ‘Indian Mujahideen’, claiming credit. The mail mentioned that there would be nine blasts in Delhi, and criticised what it said was a skew in media coverage.

Meanwhile, central agencies were believed to have picked up definite clues about the attackers. Investigators suspect that SIMI activist Tauqeer, who was last known to be in Nanded in Maharashtra, is behind the e-mail sent to the media minutes before the blasts. Official sources said the bombs were similar to the ones planted in Surat, using ammonium nitrate. That the devices were planted by a team each is indicated by the fact that the GK I device was placed at a very short distance between M-9 and M-29 shops. The Karol Bagh device appears to have been hurriedly left some distance away from the main Ajmal Khan Road market, they said.