washington/yangon unite state identify one person might impose sanction brutal crackdown myanmar minority rohingya muslims examine others u.s. secretary state rex tillerson say friday tillerson last month declare violence rohingya ethnic cleanse say washington consider target sanction deem responsible 600,000 rohingya muslims flee southern bangladesh since end august continue examine circumstances around events since august attack lead enormous migration people myanmar already identify one individual examine possible individuals hold responsible target sanction u.s. tillerson tell reporters unite nations u.s. officials tell reuters president donald trump administration consider limit action stage say prepare narrow target u.s. sanction myanmar military could roll punitive measure year-end sanction aim increase pressure myanmar authorities expect hit high level military leadership stop short reimpose broad economic restrictions suspend former president barack obama accord officials speak condition anonymity limit nature new sanction expect see little warn myanmar likely satisfy international human right group u.s. lawmakers accuse myanmar arm force crimes humanity world power unite nations call myanmar campaign rohingya population ethnic cleanse well unite state late november u.s. officials washington yangon look particular ways use global magnitsky act law originally design target russian human right violators recently expand allow sanction abuse anywhere world source say take form u.s. asset freeze well ban travel unite state spokesman u.s. state department say administration final stag prepare year global magnitsky report take expansive view implementation act past year could say might deliver myanmar powerful army chief general min aung hlaing expect spar late sanction accord three u.s. officials congressional aide familiar matter november myanmar military say replace major general maung maung soe general charge rakhine state give reason transfer post head country western command immediately clear far chain command u.s. measure would reach might name two u.s. officials say trump administration consider limit action stage avoid upset delicate political balance myanmar civilian-led government head nobel peace prize laureate aung san suu kyi must still contend influential military washington also want hold tough options reserve escalate u.s. response need officials say although sanction plan still finalize u.s. officials say aim roll end december possibly christmas though one person close matter say announcement could delay early next year nothing announce sanction white house national security council spokesman say ask come measure decline comment might name preparations myanmar sanction come time washington express concern detention week two reuters journalists wa lone kyaw soe oo work stories military crackdown rohingya population rakhine state rohingya refugees bangladesh say exodus mainly buddhist country trigger military offensive response attack rohingya militant security force washington seek balance wish nurture civilian government myanmar compete influence china desire hold military accountable abuse u.s. say identify target sanction myanmar crackdown