A senior
U.S. official expressed concern on Friday about a
lack of
progress in negotiations between six world powers and
Iran over Tehran's disputed
nuclear programme, speaking on the expected last day of a May 13-16 meeting.
Iran still has some hard decisions to make. We're
concerned that
progress is **t being made and that time is short." This week's
talks are the fourth round of negotiations between
Iran and the powers - the United States, France, Germany, Britain, China and Russia - aimed at reaching a long-term deal by a self-imposed July 20 deadline.
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