UPDATE 2-Iran's Rouhani rejects talks with Washington

Tehran and Washington have escalated rhetoric against each other in recent weeks as the United States has tightened sanctions with what it says is the goal of pushing Iran to make concessions beyond the terms of its 2015 nuclear deal. Trump withdrew the United States a year ago from the deal between Iran and global powers, under which Tehran curbed its uranium enrichment capacity, a potential pathway to a nuclear bomb, and won sanctions relief in return.

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