Israel has warned on Sunday that its ceasefire agreement with Hezbollah could collapse if the Iran-backed group does not withdraw beyond the Litani River, one of the key stipulations of the truce.

Visiting US envoy Amos Hochstein said Israeli forces began withdrawing on Monday from a south Lebanon border town more than halfway into a fragile ceasefire between Israel and Hezbollah.

Amos Hochstein's visit comes amid uncertainty over the ceasefire between Israel and Hezbollah as well as an upcoming presidential vote in Lebanon's parliament.

The Israeli army said Thursday it struck Hezbollah medium-range rocket launchers at a military site belonging to the pro-Iranian Hezbollah movement in southern Lebanon. The army said Hezbollah rocket launchers adjacent to a military site in the area of Nabatieh,

U.S. envoy Amos Hochstein the Israeli Army has started to withdraw from the western sector of south Lebanon and will continue to do so until completely out of Lebanon in what he described as "a successful process.

In a news conference in Lebanon following meetings with top Lebanese officials, Hochstein said these withdrawals would continue until the Israeli army was completely out of the country.

Lebanese army troops accompanied by UN peacekeepers entered the southern Lebanese town of Naqoura on Monday after Israeli troops withdrew from the area, state media and security sources said. The step came after the five-member ceasefire committee met in Naqoura in the presence of US envoy Amos Hochstein,