The U.S. military says it remains “present and vigilant” in the Strait of Hormuz after Iran announces it is closing the waterway. U.S. Central Command (CENTCOM) issues a statement shortly after Iran’s announcement, saying U.S. forces are positioned to ensure that “all aspects of the agreement with Iran” are adhered to and remain in full force and effect. CENTCOM adds that 55 commercial vessels transited the strait on Saturday and that safe passage through the international waterway remains intact. Iran’s decision is presented as a response to Israeli strikes on Lebanon, which Iran describes as violating its fragile deal with the United States. Separate reporting also characterizes the U.S. stance as focused on ensuring the agreement is followed. The developments come as U.S. and Iranian negotiators are expected to continue discussions in Switzerland on implementing the agreement. Vice President JD Vance is also reported to have said he expects to travel to Switzerland in the days following the announcement. Overall, sources describe heightened diplomatic and security tension while also indicating that commercial traffic is still passing through the strait.