New Delhi, July 31 -- The Central Bureau of Investigation (CBI), acting on Supreme Court directions, has filed 22 cases to investigate a possible nexus between builders and banks in sanctioning huge amounts under so-called subvention schemes without following any due diligence and carried out raids at 47 locations in the national capital region (NCR), officials said on Wednesday. "In a major crackdown on builders involved in cheating and defrauding thousands of homebuyers in NCR and to investigate the nexus of builders and officials of financial institutions, CBI has registered 22 cases against different builders of NCR and unknown officials of various financial institutions in compliance of the directions of the Supreme Court and conducted searches at 47 premises across NCR," a CBI spokesperson said....