Iran’s supreme leader has denounced a proposal by the United States aimed at curbing Tehran’s nuclear efforts and demanded that his country retains national independence amid reports of Washington offering to become involved in Tehran’s nuclear program.

Iran rejected a U.S.-proposed nuclear deal Wednesday, vowing to continue enriching uranium while negotiations appear to be stalling after five

Iran's supreme leader on Wednesday criticized an initial proposal from the United States in negotiations over Tehran's rapidly advancing nuclear program, though he stopped short of entirely rejecting the idea of agreement with Washington.