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.

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.