Tehran: Iran warned on Tuesday that new US sanctions targeting its supreme leader and other top officials meant "closing the doors of diplomacy" between Tehran and Washington amid heightened tensions, even as the country's president derided the White House as being "afflicted by mental retardation."

President Hassan Rouhani went on to call the sanctions against Supreme Leader Ayatollah Ali Khamenei "outrageous and idiotic," especially since the 80-year-old Shiite cleric has no plans to travel to the United States.