Authorities in Bangladesh say they've arrested three men, including a British citizen, for their involvement in the murders of two secular bloggers.

Maj. Maksudul Alam, a spokesman for the country's Rapid Action Battalion, said Tuesday that the three men were suspected members of a banned Islamic militant outfit. Bangladesh had banned the Ansarullah Bangla Team in May after police accused the group of threatening and killing bloggers and writers.

Alam said one of the arrested men, Touhidur Rahman — a British citizen of Bangladeshi origin — was the mastermind and financier of the attacks on bloggers Avijit Roy and Ananta Bijoy Das, who were killed earlier this year.

The suspects were arrested Monday night in raids in Dhaka.