ankara turkey urge unite state monday review suspension visa service arrest u.s. consulate employee sharply escalate tension two nato ally drive turkey currency stock low relations ankara washington plague dispute u.s. support kurdish fighters syria turkey call extradition u.s.-based cleric indictment turkish former minister u.s. court last week arrest turkish employee u.s. consulate istanbul mark fresh low turkey say employee link u.s.-based muslim cleric fethullah gulen blame ankara fail military coup july 2016. gulen deny connection coup u.s. embassy ankara condemn ankara charge baseless announce sunday night halt non-immigrant visa service turkey reassess turkey commitment security missions staff within hours ankara announce take measure u.s. citizens seek visa turkey u.s. ambassador say duration visa service suspension would depend talk two governments reason detention local staff turkey write statement late monday ambassador john bass say length suspension would also depend turkish government commitment protect facilities personnel turkey note move visa ban turkish citizens valid visa could still use visa applications could make outside turkey u.s. embassy unable learn reason arrest turkish staff member last week evidence exist employee bass say add allow sufficient access employee lawyer justice minister abdulhamit gul say washington serious security concern missions turkey step would take address issue regard arrest consulate employee decision turkish judiciary make gul tell haber television try turkish citizen crime commit turkey right turkish foreign ministry summon u.s. diplomat urge unite state lift visa service suspension say cause unnecessary tensions president tayyip erdogan also criticize u.s. move u.s. embassy ankara take decision implement upset erdogan tell news conference visit ukraine state-run anadolu news agency say another u.s. consulate worker summon testify wife daughter suspect link gulen say emerge question metin topuz employee arrest last week diplomatic spat spook investors lira drop 3.4 percent stand 3.7385 dollar quote overnight touch level 3.9223. main bist 100 stock index fell much 4.7 percent close day 2.73 percent 101,298 point airline share particularly hard hit flag carrier turkish airlines fall percent central bank say follow developments closely look like really serious situation say blue bay asset management strategist timothy ash add central bank would need move quickly calm market nerve possibly hike interest rat something erdogan resist turkey lead business association tusiad warn dispute would harm bilateral economic social cultural tie call disagreements settle calmly row unite state coincide deep strain turkey relations germany another key ally turkish military activity syrian iraqi border though market impact far limit u.s.-turkish tensions rise recent months u.s. military support kurdish ypg fighters syria consider ankara extension ban pkk wag insurgency three decades southeast turkey turkey also press far vain unite state extradite gulen view ankara mastermind behind fail coup 240 people kill friction unite state also arise indictment last month u.s. court turkey former economy minister zafer caglayan charge conspire violate u.s. sanction iran sinan ulgen analyst former turkish diplomat say underlie dispute create crisis confidence make late fall-out particularly bitter harshness result build-up say consider solely reaction detentions consulate employees turkey urge u.s. review visa suspension lira stock tumble