Without a public commitment, U.S. envoy Thomas Barrack will cease negotiations in Beirut, and Washington will not pressure Israel to stop airstrikes or withdraw troops from southern Lebanon. 

Hezbollah, labeled a terrorist group by the U.S., insists Israel must first end its strikes and pull out. 

Lebanese PM Nawaf Salam plans a cabinet session soon, as fears grow of escalated Israeli strikes if no action is taken.