According to a report by Politico , China and Russia are in advanced secret talks with Iran to replenish Iran's supply of an important chemical compound used to propel ballistic missiles. Diplomats familiar with the matter told Politico that this move would mark a clear violation of United Nations sanctions and possibly help Moscow replenish its depleted stock of rockets. Politico stated that representatives for China, Russia and Iran did not respond to requests for comment. The report noted that both the U.S. and Europe have repeatedly cautioned China against offering Russia military support.