The National Investigation Agency on Monday filed a chargesheet in connection with the Burdwan blast case at a special court in Kolkata.
Last Monday, the NIA had arrested a person from a railway station in Kolkata, suspected of carrying out militant activities and playing a role in the blast.
The man is being suspected to be associated with militant organisation Jamaat-ul Mujahideen Bangladesh (JMB).
The agency has so far arrested 18 suspected militants in the case. (ANI)