Dhaka, Bangladesh. December 21 2011 [DrikNEWS] - Police including other law enforcers cordoned off the party of office Bangladesh Nationalist Party (BNP), the main opposition party at Naya Paltan since the party activists started coming and gathering there for a mass procession against government oppression and police attack on BNP people on last Sunday. Police picked up several activists of BNP while they were trying to go to party office in this afternoon.