Police cordon off the BNP headquarters in Dhaka's Naya Paltan on Saturday, after authorities denied the party permission to hold a rally there.Police cordon off the BNP headquarters in Dhaka's Naya Paltan on Saturday, after authorities denied the party permission to hold a rally there.BNP Senior Joint Secretary General Ruhul Kabir Rizvi address a press conference at the Naya Paltan party headquarters on Saturday.