Iran warns United States and allies against new attack, threatens retaliation

On Sunday, September 20, 2026, Iran warned the United States and its allies against a new attack, saying it had information such a move was being prepared. Iran's military central command threatened sustained retaliation against US bases and interests, and said Washington's regional allies would be considered parties to the conflict. The warning came after drone and missile strikes on Saudi Arabia, which the US State Department cited in a security alert issued on Saturday. The alert mentioned potential for unforeseen escalation in the Middle East. The Houthis, backed by Iran, claimed strikes on Riyadh and Yanbu, adding to tensions in the region.