Senior diplomats from Iran, Russia and China gathered in Beijing on Friday for talks on Tehran's nuclear issues, Chinese state broadcaster CCTV reported, days after Tehran rejected U.S. "orders" to resume dialogue over the Iranian nuclear programme.

China, Iran and Russia conducted joint naval drills Tuesday in the Middle East, offering a show of force in a region still uneasy over Tehran's rapidly expanding nuclear program and as Yemen's Houthi rebels threaten new attacks on ships.