Mosiruddin alias Mosi alias Majnu was arrested by NIA from Viswabharati Fast Passenger train at Burdwan station yesterday.
Based on his statement that his family was running provision stores in Tirupur for the last six years, the sleuths visited the stores and their residence, police said.
After seizing six sim cards, a laptop and two election ID cards, the officials took Mosiruddin's wife, their two children and two others into custody for questioning last night, they said.
A sharp weapon and an airgun were seized from Mosiruddin after he was arrested by Burdwan railway police and the West Bengal police from Viswabharati Fast Passenger train following specific inputs from the NIA.