Hafez Mollah was produced before acting Chief Judicial Magistrate (ACJM) Priyanka Basu.
Mollah was detained by the CID from his house at Khar Duttapara in Purbostholi, about 70 km from here yesterday and was arrested today, DIG (Operations), CID Dilip Adak told PTI.
Two women were also arrested yesterday in connection with the blast in which involvement of terror outfits like LeT and HuJI is being suspected.
The women, Rajira Bibi alias Rumi hailing from Karimpur in Nadia and Amina Bibi hailing from Lalbagh in Murshidabad were remanded to police custody for nine days by a local court yesterday.