A joint team of the NIA and Bihar Police reached Tahseen's house in Maniyarpur village, about 12 km from the district headquarters, and attached the property in the presence of his father Wasim Akhtar and other family members, Officer in-Charge of Maniyarpur Police Station Asgar Imam said.
The NIA and police executed the order of the Patna court to attach the fugitive's property after the deadline to surrender expired on January nine.
Tahseen, who is believed to have taken command of IM after its co-founder Yasin Bhatkal was caught, is considered the 'mastermind' of the serial blasts at the rally of BJP Prime Ministerial candidate Narendra Modi in Patna on October 27 last year as well at the Buddhist shrine at Bodh Gaya earlier in July.
Eight persons were killed in Patna blasts at the Gandhi Maidan. The Bodh Gaya blasts left two Buddhist monks injured.
Tahseen had fled home in 2011. His uncle Taqi Akhtar, who is a state JD(U) leader, had said that he had no relation with the family of his brother after partition of their property almost three years ago.