Iran announced the closure of the Strait of Hormuz on Saturday, accusing Israel of continuous violations of a new ceasefire in southern Lebanon and blaming the US for a "breach of contract." The Revolutionary Guards' naval force warned vessels to stay away or risk being jeopardized. The strait, a critical conduit for oil and gas, had been blockaded by Iran for much of the war but reopened under a preliminary accord signed this week by President Trump and Iranian President Pezeshkian, with shipping traffic resuming in recent days.