Abideen a resident of Bhatkal in Karnataka was arrested by the Mahrashtra ATS just as he arrived from Saudi Arabia.
It may be recalled that he had been detained in Saudi Arabia a few months ago following a request by India.
The Maharashtra ATS says that he is a key operative and is wanted by the police of many states in connection with various blasts.
Chasing the explosives trail
The sourcing of explosives by the operatives of the Indian Mujahideen has by and large remained a mystery.
While each of the bombs used by them had a signature style as it contained ammonium nitrate, there was a bit of a difference in the explosives used in the Pune German Bakery blasts.
It was one of those rare occasions when the Indian Mujahideen had used RDX along with ammonium nitrate.
Sourcing RDX is extremely difficult and the ATS would seek to know the source of the same. Further the ATS is also questioning him on the trail of the explosives used in the Zaveri Bazaar blasts.
There are other state police officials too waiting to question Abdeen. His name had cropped up during the investigations conducted in the Ahmedbad, Bengaluru and Hyderabad blasts as well.
An ATS official tells Oneindia that the mystery behind the supply chain of explosives will be unearthed soon. Our focus is currently on the Pune and 13/7 Mumbai blasts cases.
Riyaz Bhatkal ordered sourcing RDX?
Abdeen holds the key to answering a key question on how the Indian Mujahideen had sourced the RDX for the Pune blasts.
Preliminary investigations had suggested that it was Riyaz Bhatkal who is based in Karachi ordered another Pakistani operative Waqas to hand over the explosives to Abdeen. It was Waqas who later handed over the RDX to Abdeen, the ATS also claims.
The traces of RDX in the German Bakery blasts had shocked investigators. The IM had been using an easily available ammonium nitrate in the blasts that they carried out between 2006 and 2013 in which nearly 300 people had died.
However the traces of RDX that were found in the Pune blasts led investigators to believe that it may have been stolen from a highly sensitive location or smuggled in from Pakistan.