During a visit to Brussels, Hariri, son of the assassinated former PM Rafik Hariri, also urged the European Union to help pressure Syria to stop undermining attempts to set up a tribunal to investigate his father's murder.

"There have been efforts by Saudi Arabia and Iran to get the crisis in Lebanon resolved," the head of the pro-democracy majority told reporters at the European Parliament.

"Saudi Arabia knows the politics of Lebanon. Iran has a role because of its involvement with Hezbollah. So hopefully there is a kind of discussion that is ongoing now in finding an end to this crisis," he said.

But Hariri added: "I believe that the main problem today is the Syrian regime which is trying to stop this agreement from happening ."

In Tehran, an official said that Iranian President Mahmoud Ahmadinejad is due to visit Saudi Arabia on Saturday for talks with the kingdom's leaders on developments in the region.

Lebanon has been in turmoil since February 14, 2005 murder of the popular prime minister, which has been widely blamed on Syria. After the killing, Damascus was forced to end the 29-year military domination of its small neighbor.

But since then Lebanon has been shaken by further attacks, often blamed on Syria, a war between Israel and the Lebanese Hezbollah movement that left over 1,200 dead, mostly civilians, and an opposition campaign to oust the government.

"What we are asking the EU, and others, is to tell those countries to stop interfering in the Middle East conflicts. Lebanon is way too small for them to be interested in it," Hariri said.

"There is interference from Syria and the Syrian regime to stop this tribunal," he said.

"I hope that the EU takes our case," he added, while acknowledging all that Brussels has already done.

On Wednesday, EU foreign policy chief Javier Solana said: "We hope that the interference from other countries outside Lebanon should be positive in order to solve the problem, and not negative in order to prevent a solution."

Lebanon's government has been paralyzed since November when six pro-Syrian ministers quit, triggering a campaign led by the Shiite Muslim Hezbollah to oust the cabinet of Western-backed Prime Minister Fouad Siniora.

The political feuding has arisen in part over his government's backing for a UN tribunal to try suspects in the Hariri killing, a move opposed by Syria and its allies in Lebanon.

Saad Hariri said the best way to end the impasse is to get the court up and running.

"The solution to this crisis is to open a dialogue, to ratify the international tribunal," he said. "Lebanon must pass this tribunal because Lebanon is being assassinated."

But pro-Syrian parliament speaker Nabih Berri has refused to allow the government to submit a bill that would authorize the court, effectively blocking the tribunal's creation.

Earlier this month, the United Nations said it had signed a deal with the government to set up the tribunal. However the deal must comply with Lebanon's constitution, meaning it must be ratified by the divided parliament.

Hariri's visit comes as Walid Jumblatt, Lebanon's Progressive Socialist Party leader and a prominent pro-Democracy member of parliament, seeks help in the United States.

"I will do everything to liberate my country from indirect Syrian occupation," Jumblatt said ahead of talks with US Secretary of State Condoleezza Rice.