istanbul turkish police detain 17 people part investigation relate gold trader reza zarrab cooperate prosecutors u.s. trial state-run anadolu news agency say tuesday police detain three zarrab employees suspicion deliver document network muslim cleric fethullah gulen u.s. prosecutors anadolu say ankara say u.s. prosecutors base case document fabricate gulen followers also blame orchestrate last year fail coup turkey zarrab turkish iranian national plead guilty charge scheme help iran evade u.s. sanction testify u.s. prosecutors executive turkish state-owned bank relate charge executive plead innocent bank say transactions comply international regulations case strain tie unite state turkey members nato military alliance infuriate president tayyip erdogan cast trial attempt undermine turkey economy right plot allegation trial indictment plot turkey unite state erdogan tell members rule ak party parliament trial international coup attempt process center feto say use turkish government term gulen network gulen live unite state since 1999 deny charge behind coup condemn military intervention police search house three employees find electronic copy document anadolu say say fourteen people detain part investigation one immediately available comment istanbul police headquarter last week istanbul prosecutor office decide seize assets zarrab acquaintances part investigation anadolu report turkey detain 17 people investigation relate gold trader zarrab agency