Mohamed ElBaradei, director general of the International Atomic Energy Agency (IAEA), is in Tehran for talks with the country's leadership on Iran's controversial uranium enrichment program. He met with Saeed Jalili, the secretary of Iran's Supreme National Security Council, before returning to Vienna on Sunday.
Five permanent members of the UN Security Council and Germany aimed to persuade Tehran to halt uranium enrichment, but the talks stalled with the imposition of sanctions against the Islamic Republic, which some Western countries suspect is pursuing a weapons program.
Iran denies the allegations, saying it intends to use nuclear power purely for electricity generation.
Two sets of UN Security Council sanctions are currently in place against Iran over its refusal to halt uranium enrichment that could be used in both electricity generation and weapons production. A further round of more stringent sanctions has so far been blocked by China and Russia.
U.S. President George W. Bush said on Thursday during his visit to the Middle East that until Tehran stops uranium enrichment, the Islamic Republic remains a "threat to world peace."
