Bangladesh's elite Rapid Action Battalion has arrested an alleged operative of banned HuJI, who is one of the accused in the assassination of the country's former finance minister Shah AMS Kibria in 2005.
Officials said the elite anti-crime troops detained Shah Mizanur Rahman Mithu (23) from a village in Habiganj district last night.
"The Huji operative admitted his involvement with the grenade attack on Kibria," an RAB spokesman said.
Kibria, an high-profile leader of the now ruling Awami League, was killed in a grenade attack on January 27, 2005 while he was addressing a public rally at his constituency in Habiganj.
HuJI was suspected to have carried out the attack at the behest of Opposition BNP leader Lutfuzzaman Babar.
The HuJI operative also admitted to the elite force that he himself had thrown the grenade, RAB officials said.
He was a student of a local madrasa when he came in touch with the Huji men in 2005.
The arrest came weeks after Babar was remanded in custody for his alleged role in the assassination.
A court had last week asked the Criminal Investigation Department (CID) to file a supplementary investigation report of the case on March 20.
Babar is suspected to have masterminded several other attacks, including the August 21, 2004 grenade attack on Hasina when she was the opposition leader.