Israeli and Lebanese troops have clashed on the two countries' border, raising concerns that a new round of fighting might erupt.
A senior Israeli officer, two Lebanese soldiers and a Lebanese journalist were killed in the exchange of fire, the most serious violence along the frontier since the two countries went to war in 2006.
The United Nations and the United States urged both sides to show restraint.
Hezbollah fighters, who battled Israel four years ago, took no part in the exchange of fire. But the group's leader Sayyed Hassan Nasrallah said his guerrillas would not stand silent if Israel attacked the Lebanese army in the future.
Lebanon and Israel gave different accounts of the events leading up to the clash and the UN peacekeeping force in southern Lebanon said it had yet to ascertain the circumstances leading to the bloodshed.
The Lebanese army said an Israeli patrol had crossed the technical line of the border although UN peacekeepers had told it to stop. Major-General Gadi Eisenkot, head of Israel's northern command, said Lebanese snipers fired at officers inside Israeli territory.
