Iran announced Saturday that it said it had closed the Strait of Hormuz — a critical global oil shipping corridor — citing ongoing Israeli military strikes in southern Lebanon during an active ceasefire agreement. The announcement threatens global energy markets and disrupts the Trump administration's broader peace negotiations, which Vice President JD Vance is now heading to Switzerland to salvage. However, U.S. officials said they saw no evidence the strait was actually closed, even as Iran made the formal announcement. The underlying trigger remains the same: Israel's continued military operations that, according to Iran, violate the ceasefire terms both sides agreed to.