A ceasefire negotiated through U.S. mediation between Tel Aviv and Beirut is encountering significant resistance. Israeli Defense Minister Israel Katz had already stated that military operations in southern Lebanon would continue despite the truce. Now, Hezbollah has formally rejected the ceasefire arrangement, casting doubt on its implementation. The development comes at a sensitive moment for regional diplomacy, as Iran has repeatedly indicated that any agreement with the United States would depend on an end to hostilities in Lebanon. As tensions persist, Washington's hopes of advancing broader negotiations with Tehran appear increasingly uncertain, further complicating efforts to achieve lasting peace in the Middle East.