A ceasefire deal that could end more than a year of cross-border fighting between Israel and Lebanon's Hezbollah militant group won backing from Israeli leaders Tuesday, raising hopes and renewing difficult questions in a region gripped by conflict.

Traffic jams line the route between Beirut and the south after the ceasefire began at 04:00 local time (02:00 GMT).

The agreement with Lebanon will maintain Israel's freedom of operation there to act in defence to remove threats posed by Hezbollah and enable displaced residents to return safely to their homes in northern Israel, Israeli government spokesperson David Mencer told Reuters.