[The United States issues a new security alert for the Middle East] September 20th, US embassies in many countries in the Middle East issued a new security alert on the 19th, saying that the military conflict between the Houthi armed forces in Yemen and Saudi Arabia is likely to "rapidly escalate." The security alert stated that Yemen's Houthi armed forces launched a new round of attacks on Saudi Arabia and that the military conflict was likely to "rapidly escalate." Americans in the Middle East were advised to "remain on high alert" and prepare for possible travel disruptions. Turki al-Maliki, spokesman for the Saudi-led multinational coalition, said on the 19th that Saudi air defense forces intercepted a ballistic missile launched by the Houthi armed forces in Yemen towards the Saudi capital Riyadh early that morning. The Houthi armed forces announced on the evening of the 19th that the organization launched two military operations, attacking "sensitive targets" in Riyadh and Saudi Aramco's facilities in Yanbu. (Xinhua News Agency)