Foreign secretary says Iran also wants to enrich uranium beyond peaceful levels . The United States and its allies say they are trying to prevent Tehran from developing nuclear weapons. The United Nations passed a fourth round of sanctions against Iran in June 2010 , aimed at pressuring it to suspend its nuclear program . Tests are in contravention of a U.N. resolution , Hague says . The United States imposed new sanctions against Iran last week .
Foreign secretary says Iran also wants to enrich uranium beyond peaceful levels . The United States and its allies say they are trying to prevent Tehran from developing nuclear weapons. Tests are in contravention of a U.N. resolution , Hague says . The United States imposed new sanctions against Iran last week .