According to DCB officials, Nagori had been in touch with a number of SIMI leaders in Ahmedabad and Vadodara.

Some of the other SIMI activists whom the DCB may bring to Ahmedabad for questioning include Nagori's younger brother Karimuddin, Ameel Parvez and the chief of SIMI in Kerala, Shibly Peedical. At present, all of them are languishing in Madhya Pradesh jails.

"Nagori and Karimuddin were the key trainers at the SIMI camps organised in Kerala (December 2007) and Halol in Gujarat (January 2008)," said Joint Commissioner of Police (DCB) Ashish Bhatia.

He added, "These two are the key men behind the Ahmedabad blasts. They may also be involved in the Jaipur and Hyderabad blasts."

"At the moment, we are concentrating on the interrogation of those arrested by us. Later, we will bring Nagori for interrogation, as we believe he was instrumental in planning the blasts. He might have also arranged for funds to procure the explosives," Bhatia said.

According to DCB officials, the Nagoris regularly visited SIMI activists in Vadodara and Ahmedabad. Also, they were in constant touch with some of the accused arrested by the DCB for their role in the blasts.