Russian President Dmitry Medvedev says Iran is moving closer to having the potential to create nuclear weapons. <br/><br/>Mr Medvedev told a meeting of ambassadors in Moscow that Iran is moving closer to possessing the potential which in principle could be used for the creation of nuclear weapons. <br/><br/>It is one of the first times Moscow has publicly recognised that Iran might be moving towards a nuclear weapon. Russia, which has strong economic and military ties with Iran, has traditionally been an ally of Tehran. <br/><br/>But it has recently adopted a tougher stance towards Tehran's nuclear drive, and backed the fourth round of UN sanctions that was imposed last month. On 10 June, the UN Security Council endorsed a fourth round of sanctions on Iran, including tighter financial curbs and an expanded arms embargo.