Iranian Foreign Minister Manouchehr Mottaki pledged full cooperation in implementing UN Resolution 1701, which generally stopped the fighting between Israel and the Hezbollah militia.

Mr Annan, who met privately on Saturday with Iranian leaders, said the resolution, passed by the Security Council on August 14, was the main topic of discussion. He also met with Iranian Supreme National Security Council Secretary Ali Larijani, and called the meeting "a very good and constructive discussion."

The UN head was to meet with Iranian President Mahmoud Ahmadinejad, two days after the president flouted a UN deadline for suspending its enrichment of uranium, and reiterated Iran's determination to forge ahead with its nuclear programme.

Annan's visit to Iran comes as part of a series of diplomatic trips across the Middle East in an effort to maintain the peace between Israel and Lebanon.

CNN