Lebanon's Western-backed Prime Minister Fuad Siniora has agreed with Iranian officials to draw up a framework for bilateral cooperation between the two nations ahead of a possible visit by Siniora to Tehran, a Lebanese government source said Monday.

Mohammad Shibani, Iran's ambassador to Lebanon, met with the prime minister over the weekend and renewed his invitation for Siniora to visit Tehran, the source, who requested anonymity, said.

"The renewal of the invitation does not mean the trip is going to take place anytime soon," the source said, noting that any decision is "pending a visit by an Iranian delegation to Beirut to draw up the frame of bilateral cooperation between the two countries."

The source stressed that Siniora had no objection to visiting Iran.

Iran is the main backer of the Lebanese Shi'ite Movement Hezbollah, which is currently leading the Lebanese opposition against the Siniora government and his allies, the anti-Syrian March 14 camp.

In May 2008, Hezbollah protested a decision by Siniora's government to sack a Hezbollah supporter acting as head of security at Beirut international airport.

The decision prompted Hezbollah and their allies to close roads. The action later escalated into bloody clashes between the opposition and supporters of the ruling coalition. The fighting lasted seven days and resulted in 82 deaths more than 200 wounded.

The fighting stopped after Qatar called for an emergency meeting of all Lebanese rivals in Doha to sign an agreement of reconciliation.