"We want to interrogate Tunda about his terrorist network in Bengal and about his connection with his father-in-law Taher alias Zakaria," a senior official of the STF told PTI.
Abu Taher was arrested by the Kolkata Police in 2009.
Sleuths believe that Tunda along with Abu Taher had created a terror network in Kolkata as well as the bordering districts of Bangladesh to provide logistic support to the terrorists entering India via Bangladesh.