istanbul turkey vakifbank say friday never interest involvement whatsoever process mention u.s. trial turkish bank executive accuse help launder money iran vakifbank always act compliance laws relate legislations show utmost care diligence act accordance laws relate legislations bank say statement istanbul stock exchange turkish-iranian gold trader reza zarrab testify unite state thursday two turkish authorize vakifbank another lender move fund iran share vakifbank 1.6 percent early trade istanbul turkey 's vakifbank deny involvement process mention u.s. lawsuit