Shamkhani had been key in negotiations with Gulf Arab states as they sought to de-escalate tensions with Tehran, including being on hand for the announced détente between Iran and Saudi Arabia reached in China.
Iran's president appoints new official in powerful security post, replacing longtime incumbent
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Iran's top security official, Ali Shamkhani, said on Twitter on March 14 that Tehran will stay in the talks until a "strong agreement that meets all our legal and logical demands" is reached.
Iranian foreign minister plans Moscow trip to save nuclear deal
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