Iran said on Thursday the United States has made extra demands and accused it of working to “complicate” efforts to restore a 2015 nuclear deal, after new Russian requests linked to the Ukraine war raised concerns of fresh delays. The AFP Ne3ws Agency reports that Iran’s supreme leader Ayatollah Ali Khamenei, who has the final say in major state policies, meanwhile, stressed his country will not give up on elements of “national strength”, such as nuclear progress and regional influence.