Two day after two top militants of the banned National Liberation Front of Tripura were arrested in Tripura, two more hardcore cadres of the outfit and one of their collaborators were arrested on Saturday immediately after they fled from their Bangladeshi hideout. Police said that acting on specific inputs of Special Branch, North Tripura district Police and Tripura State Rifles (TSR) conducted operations in the early morning of Saturday and arrested the extremists near Bhandarima along Bangladesh border.