Lebanon's army, tasked with ensuring the ceasefire lasts, said it was preparing to deploy to the south of the country, a region Israel heavily bombarded in its battle against the Iran-backed militant group, along with eastern cities and towns and Hezbollah strongholds in the southern suburbs of Beirut.
The military asked that residents of border villages delay returning home until the Israeli military, which has waged war against Hezbollah on several occasions and pushed around 6km into Lebanon, withdraws.
Israel said it identified Hezbollah operatives returning to areas near the border and had opened fire to prevent them from coming closer. There were no signs that the incident would undermine the ceasefire.
The agreement, which promises to end a conflict across the Israeli-Lebanese border that has killed thousands of people since it was ignited by the Gaza war last year, is a major achievement for the US in the waning days of President Joe Biden's administration.
Lebanese caretaker PM Najib Mikati urged Israel to "withdraw from all the regions" it occupied. (AP PHOTO)
The deal is likely to enable Israel to focus more closely on the conflict in shattered Gaza, where it has vowed to destroy its long-time enemy the Palestinian Islamist group Hamas, which led the October 7, 2023, attacks on Israeli communities.
Hamas official Sami Abu Zuhri told Reuters that the group "appreciates" Lebanon's right to reach an agreement which protects its people, and hopes for a deal to end the Gaza war.
Lebanon's caretaker Prime Minister Najib Mikati appealed to Israel to fully commit and "withdraw from all the regions and positions it occupied", hours after the truce between Israel and Hezbollah was activated.
Cars and vans piled high with mattresses, suitcases and even furniture streamed through the southern port city of Tyre, which was heavily bombed in the final days before the ceasefire, heading south. Fighting had escalated over the past two months, forcing hundreds of thousands of Lebanese from their homes.
Israel has said its military aim had been to ensure the safe return of about 60,000 Israelis who fled from their communities along the northern border when Hezbollah started firing rockets at them in support of Hamas in Gaza.
In Lebanon, some cars flew national flags, others honked, and one woman could be seen flashing the victory sign with her fingers as people started to return to homes they had fled.
Announcing the ceasefire, Biden spoke at the White House on Tuesday shortly after Israel's security cabinet approved the agreement in a 10-1 vote.
"This is designed to be a permanent cessation of hostilities," Biden said. "What is left of Hezbollah and other terrorist organisations will not be allowed to threaten the security of Israel again."
Israel will gradually withdraw its forces over 60 days as Lebanon's army takes control of territory near its border with Israel to ensure that Hezbollah does not rebuild its infrastructure there after a costly war, Biden said.
He said his administration was also pushing for an elusive ceasefire in Gaza.
Egypt and Qatar, which along with the United States, have tried unsuccessfully to mediate a ceasefire in Gaza, welcomed the Lebanon truce. Qatar's foreign ministry said on Wednesday it hoped it would lead to a similar agreement to end the Gaza war.
Iran, which backs Hezbollah and Hamas as well as the Houthi rebels that have attacked Israel from Yemen, said it welcomed the ceasefire.
Hezbollah has not formally commented on the ceasefire but senior official Hassan Fadlallah told Lebanon's Al Jadeed TV that while it supported the extension of the Lebanese state's authority, the group would emerge from the war stronger.
The Israeli military said on Wednesday Israeli forces fired at several vehicles with suspects to prevent them from reaching a no-go zone in Lebanese territory and the suspects moved away.
Defence Minister Israel Katz said he instructed the military to "act firmly and without compromise" should it happen again.
Israeli Prime Minister Benjamin Netanyahu says Hezbollah is considerably weaker. (AP PHOTO)
Netanyahu said the ceasefire would allow Israel to focus on the threat from Iran, give the army an opportunity to rest and replenish supplies, and isolate Hamas.
Hezbollah was considerably weaker than it had been at the start of the conflict, he added.
"We have pushed them decades back. We eliminated Nasrallah, the axis of the axis. We have taken out the organisation's top leadership, we have destroyed most of their rockets and missiles," Netanyahu said.
