The National Investigation Agency (NIA) on Thursday arrested two people, Arif Abubakar Shaikh (59) and Shabbir Abubakar Shaikh (51) in connection with a case against fugitive gangster Dawood Ibrahim and his aides. NIA said the accused were close to gangster Chhota Shakeel and involved in illegal activities of Dawood's D-gang. NIA questioned them for four days before making the arrest.