China and Russia stood by Iran on Friday after the United States demanded nuclear talks with Tehran, with senior Chinese and Russian diplomats saying dialogue should only resume based on "mutual respect" and all sanctions ought to be lifted.

Beijing sought to position itself as a key player in negotiations with Iran over its nuclear program, as President Trump called for talks with Tehran.

Representatives of China, Russia and Iran called Friday for an end to U.S. sanctions on Iran over its rapidly advancing nuclear program and a restart to multinational talks on the issue. The three countries' meeting was the latest attempt to broach the matter and come after U.