UN Secretary-General Kofi Annan (R) and US Secretary of State Condoleezza Rice

A statement read out by D'Amato on behalf of the co-chairs -- Italy and the US -- said the participants "expressed their determination to work immediately to reach with the utmost urgency a ceasefire that would put an end to the current violence and hostilities."

However, it added: "The ceasefire must be lasting, permanent and sustainable," virtually ruling out an immediate ceasefire.

Rice rejected calls for an immediate ceasefire, saying any ceasefire must address the root causes and Hezbollah must be disarmed as required by UN Security Council Resolution 1559.

Annan, on the other hand, urged an immediate cessation of hostilities, saying a pause of the warfare would offer "crucial hours and days" for essential humanitarian tasks, including the distribution of relief aid and the evacuation of non-combatants and the wounded.

Siniora, for his part, said Lebanon wanted an immediate ceasefire. He cautioned that there was a lot remaining to be done before a ceasefire could be achieved.

The longer a ceasefire was delayed, the more people would be killed and the more destruction would be brought, he told the press conference.