LAHORE - Pakistan Muslim League-Nawaz (PML-N) leader Khawaja Saad Rafique on Wednesday appeared before officials of the National Accountability Bureau (NAB) in connection to an inquiry into a private housing scheme scam. According to sources, the former Railways Minister was summoned by NAB Lahore on Wednesday to record his statement in the Paragon Housing Society scam. NAB Lahore has also initiated a probe against Rafique for alleged misappropriation of funds in purchase of new engines for Railways.