A new report says Iran warned the U.S. that the ceasefire may end if attacks in Lebanon continue, introducing a more cautionary assessment of the arrangement previously described as covering Lebanon. According to the provided content, heightened tensions could destabilize regional peace efforts, complicate U.S.-Iran relations, and reduce the chances of a diplomatic resolution. The update shifts the focus from possible stabilization to the risk that ongoing violence in Lebanon could undermine the ceasefire and broader regional de-escalation.