Bangladesh, had detonated bombs.
Tunda claims that after 1998, it is the first time that he has returned to India, but investigating agencies are verifying this.
Sources said that the investigation is revolving around what Tunda has been doing during the last 15 years. Why was he coming to India this time and how Pakistan based various terrorist outfits and ISI carry out and control terror modules in India.
His journey and who all did he met in all those years will be probed, the source said.
During interrogation, Tunda told police sleuths that almost all those who are wanted in India, from Hafiz Saeed to Maulana Masood Azhar and from Dawood Ibrahim to the Bhatkal brothers of Indian Mujahideen are in touch with each other in Pakistan.
"Tunda, who was in direct touch with ISI was introduced to Hafeez Sayeed by the Pakistani intelligence agencies," the official said.