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

If they enrich, then we’re going to have to do it the other way,' US president tells reporters; Iran rejected deal that would have reportedly allowed limited enrichment