ISLAMABAD: Days after Balochistan National Party (BNP-M) chief Akhtar Mengal was ‘expelled’ from the Senate gallery ahead of a vote on the 26th Amendment, the Islamabad police on Thursday registered a terrorism case against the BNP chief and several others for allegedly entering the Senate premises and ‘scuffling’ with the security staff. The police also arrested BNP leader Akhtar Hussain …