Lebanon faced new civil war fears after its anti-Syria opposition last night rejected a plea for unity talks issued hours after a bomb blast in a Beirut suburb. "President Emile Lahoud invites us to dialogue as though he is an independent when he is accused," Druze chieftain and key opposition leader Walid Jumblatt said after the pro-Syrian leader urged national dialogue.Amidst mounting tension, UN chief Kofi Annan called for stability and said he was greatly disturbed by the bombing. Eleven people were wounded when the bomb exploded early in the day beneath a car in the Christian residential neighbourhood of Jdeide, causing extensive damage. Citing "exceptional circumstances," Lahoud called for dialogue between the country's anti-Syrian opposition and parties sympathetic to Damascus, an encounter he said was critical in order to "protect Lebanon". Lahoud's office later announced that the president would not attend a two-day Arab summit starting on Tuesday in Algeria "because of the situation" in Lebanon. The blast was the first serious incident since popular former premier Rafiq Hariri and 18 other people were killed in a huge bombing in Beirut on February 28, an attack that ignited public fury and stepped up calls for the withdrawal of Syrian forces from Lebanon.