KARACHI, Oct 23 (APP): The State Bank of Pakistan (SBP), public and private sector banks will remain closed on Monday.A spokesman of SBP told APP that the banking sector will remain closed on the sad demise of former Pakistan People’s Party (PPP) chairperson Begum Nusrat Bhutto, the mother of former prime minister Shaheed Mohtarma Benazir Bhutto, who died after a protracted illness in Dubai on Sunday.