RAB official Khandaker Al Moin said that Masukur is a shura member in addition to serving as the head of the organization’s military wing. Prior to 2007, he worked at the post office and also committed robberies. After going to prison, he was motivated by militancy. In 2017, he joined Jamaatul Ansar as a founding member. In 2021, Masuku was present during the signing of the agreement with the separatists in the hills. He also played a role in determining the outline of military training in the mountains. A mobile phone was recovered from Masukur Rahman, said Khandaker Al Moin, a video of the military training of the members of the organization was found in that mobile phone. The scenes seen in the video are from September 2021 to 2022. The recovered video shows several training camps of the militants. These camps are in remote areas of Bandarban. The video is ‘starred’ by members of the organisation, who voluntarily left their homes. Amir Anisur Rahman alias Mahmud of Jamaatul Ansar is seen at the beginning of the video. Just behind him was seen a trainer of the armed organization Kuki-Chin National Front (KNF) in Chittagong Hill Tracts.
Commander Khandaker Al Moin, director of RAB’s law and media wing, said Masukur Rahman, the head of Jamaat-ul-Ansar’s military wing, was questioned about the reason for making the video. Basically, they put in the video what their position will be like during tactical movement, carrying weapons on the way, patrolling and blocking. In the video, the raider rehearsed how the members would position themselves at an angular distance of 360 degrees while attacking the enemy’s camp. There is a scene where a map is drawn on the ground to show who will be where.