Kanpur/ New Delhi/ Assam, Dec 27 (ANI): Director General (DG) of Seema Sashtra Bal (SSB) or armed border force on Friday (December 26) said they would cooperate with army and police against the National Democratic Front of Bodoland (NDFB), the tribal militant group that had shot dead more than 80 people in Assam this week. India has also sought help from Bhutan, Myanmar and Bangladesh in an offensive against the militant group. Some militants may have fled to neighbouring Bhutan while their leader is believed to be in Myanmar, officials and police said, prompting calls for cooperation. Meanwhile, SSB DG B.D. Sharma said the problem was intense in the region due to open border. Meanwhile, Indian security expert Uday Bhaskar said the Bodo problem is not a new challenge for India and persisting since last 20-25 years.