All-party national dialogue leaders failed to reach agreement Saturday and no date for another round of talks was set amid growing tensions.

The Lebanese Broadcasting Corporation International described Saturday's session as "very strained, particularly over the issue of the international tribunal."

Marwan Hamadeh, the telecommunications minister and an ally of Saad Hariri, said: "The international tribunal is a moral - not political issue and Rafiq Hariri's blood will not be sold on any negotiating table."

Hariri died, along with 22 other people, when a suicide truck bomb exploded in February 2005. The killing sparked huge anti-Syrian protests in Beirut and led to the withdrawal of Syrian troops from Lebanon after 29 years. Elections after the killing created an anti-Syrian majority in the parliament and cabinet.

Hezbollah has threatened to hold demonstrations aimed at toppling the government of Prime Minister Fouad Siniora unless a "unity" administration is formed.

"Things will get worse. There will be a protest move soon," a senior political source close to Hezbollah said. "The climate at today's meeting was very bad. This stand (by the anti-Syrian) majority will not pass without reaction."

"I don't know who is spreading a climate of fear and tension as if something is about to happen. Nothing will happen," said Samir Geagea (pictured right), leader of the Lebanese Forces, a Christian party in the anti-Syrian camp.

White House Press Secretary Tony Snow last week said there was mounting evidence that Syria was working with Hezbollah to topple the Lebanese government in an effort to prevent establishment of that tribunal.

The pro-Syrian party has threatened mass demonstrations demanding new parliamentary elections unless more of its allies are admitted to the cabinet by mid-November.

Desperate move by Hezbollah

Hezbollah accuses Siniora of failing to back it during the war and of supporting U.S. and Israeli demands for the disarmament of its guerillas. The Hezbollah head honcho Hassan Nasrallah has sought out to protect his own existence by accusing the government of being pro-Israeli. The government can only be accused of doing what is best for Lebanon by fulfilling the well known Taif Accord which calls for the disarmament of all militias.

The irony of the accusation by Hezbollah is that it has managed to survive by fear mongering, a key tactic of the Israeli government and U.S. Bush administration.

The majority coalition is willing to bring in Aoun but not to surrender a third of seats to the opposition. A third of ministers plus one can block motions in cabinet and automatically bring down the government by resigning.

Speaker Nabih Berri did not hold a news conference at the end of the crucial talks like he did in the previous three rounds of talks.

Lebanon on Friday received a draft document setting up an international tribunal to try suspects in the 2005 assassination of former Prime Minister Rafik Hariri.

LBCI said Hizbullah representatives to the talks, however in a contradictory move the Hizbullah representative assured the Lebanese that the group will not resort to street protests Monday as promised by its leader Sayyed Hassan Nasrallah.

Politicians emerged from the meeting, with some saying the talks failed to achieve a breakthrough.

In a sign of worsening tensions, leader of the Free Patriotic Movement Michel Aoun said the talks had failed to produce an agreement.

"The session was adjourned without assigning a new date for another round of talks," Aoun told reporters in a terse statement.

"We failed to reach an agreement or understanding and consequently we left (the talks)," said legislator Butros Harb.

Other politicians tried to downplay the breakup of the talks. Lebanese Forces leader Samir Geagea acknowledged the dialogue had failed to reach any agreement but suggested the talks would resume at a later stage.

"We want to continue consultations until the last minute," he said, adding that the meeting was stopped partly because Berri was scheduled to leave for Iran.

Saturday's session was the fourth this week aimed at solving differences between Lebanon's bickering politicians.

Hizbullah, which is backed by both Syria and Iran, has threatened protests that could bring down the government if its share in cabinet portfolios is not increased.

The anti-Syrian March 14 Camp denied Saturday that it had accepted giving Hizbullah and its allies effective veto power over key decisions in the cabinet in exchange for the opponents approving the international tribunal's draft in Hariri's murder.

Participants -- Christian and Muslim, pro- and anti-Syrian -- have so far failed to bridge their differences in the all-party talks that started Monday.

Aoun insisted in an interview with Hizbullah's Al Manar TV Friday that Hizbullah and its allies should hold one-third cabinet posts. Since his return from exile, Aoun has been determined to assume the presidency at whatever the cost. Even if it means aligning with Hezbollah.

Prime Minister Fouad Saniora, Berri and Aoun -- have scheduled trips abroad. Saniora was expected to travel to Japan, Berri to Iran and Aoun to Saudi Arabia, home of the infamous "petro-dollar".

Sources: Ya Libnan, Naharnet, CNN, Al Jazeera