US issues Iran travel alert as Iran warns of renewed strikes

The US has issued a travel alert urging American citizens not to travel to Iran and advising those in the region to leave, as fears of wider escalation grow across West Asia. Iran has warned of sustained retaliation if Washington renews its bombing campaign. The US State Department cited a complex security environment with potential for unforeseen escalation, including flight cancellations and airspace closures. President Donald Trump ended a Camp David visit early, saying "very big things" are coming, listing options of wiping out Iran, economic rot, or a deal. The Islamic Revolutionary Guard Corps threatened continuous attacks on US bases and interests. Tensions follow Houthi missile attacks on Saudi Arabia's Riyadh and Yanbu port, with the Strait of Hormuz effectively closed to western shipping. Trump rejected a Saudi request for military assistance, and the Houthis claimed 318 ships passed through the strait between September 10 and 18.