Abdul Sattar, who hails from Kannur in Kerala, has been arrested in Hyderabad on Tuesday.
Sattar is believed to have supplied microchip-based circuits to make Improvised Explosive Devices (IEDs) that were used in terror attacks across the country, including in Bangalore and Surat. He has links with the LeT and he was recruiting youth from Kerala to work for its modules, training them in Hyderabad and sending them to Pakistan via Jammu and Kashmir.
Investigators have gathered evidence that Sattar was frequently contacting Riyaz Bhatkal of the IM over telephone. He also provided shelter to Bhatkal when the latter arrived in Hyderabad in October, 2009 along with Qayamuddin Kapadia, an accused in the case of July 2008 Ahmedabad serial blasts.
The interrogation of Abdul Sattar established the close links among the Lashkar-e-Taiba (LeT), the Indian Mujahideen (IM) and the Students Islamic Movement of India (SIMI).