UN Secretary-General Kofi Annan said Iranian President Mahmoud Ahmadinejad today reaffirmed support for a UN resolution on Lebanon.
Mr Annan has been touring the Middle East seeking to shore up the ceasefire that halted a 34-day war in Lebanon between Israel and Iranian-backed Hezbollah guerrillas.
UN Resolution 1701 drew up the terms for the ceasefire, including expanding an existing UN peacekeeping force in Lebanon and calling for an arms embargo on Hizbollah.
After meeting Ahmadinejad, Mr Annan said the Iranian president "reaffirmed his country's support for the implementation of Resolution 1701 and agrees with me that we should do everything to strengthen the territorial integrity of Lebanon."
Foreign Minister Manouchehr Mottaki, speaking at the joint news conference, also said Iran was ready "to co-operate with the United Nations in resuming peace in Lebanon and on its borders."
Iran funded and armed Hizbollah in the 1980s but now says its support is primarily moral and political. However, it is still widely believed to be the group's main arms supplier.
Mr Annan said international peacekeepers were deploying quickly to south Lebanon, joining Lebanese soldiers moving into the region.
"That would constitute a credible force," he said, adding that Israeli troops would then be able to withdraw. More than 500 Italian troops had landed in south Lebanon by mid-morning today from a force of 800 that had arrived off Lebanon to help keep the peace.
Heavy equipment would be flown in later today, a UN spokesman said. Italy has pledged 3,000 troops to a UN plan to increase the existing 2,000 peacekeepers in Lebanon to 15,000 to help enforce the truce. Italy's contingent will be the biggest in the force, known as UNIFIL II.