Kokrajhar, Jan 10 (ANI): In a joint operation, police and army arrested seven militants and recovered huge cache of arms and ammunitions in connection with attacks in Assam , which killed at least 80 people. Police believe that a faction of the National Democratic Front of Bodoland (NDFB), fighting for a separate state for ethnic Bodos, was behind coordinated attacks on tea plantation workers and their families in Assam. Sub-divisional police officer, Kokrajhar district, Ankur Jain said that seven militants were arrested of (NDFB). He added that arms and ammunitions, including four AK-47, M-16 rifles and others, were also recovered.