A U.S. official confirmed to ABC News that U.S. air and naval assets hit dozens of Houthi targets in Yemen, including missiles, radars, and drone and air defense systems. The official characterized the attacks as an opening salvo against the Houthis, and it sends a strong message to Iran.

Iran on Sunday once again denied aiding Yemen's Houthi rebels after the United States launched a wave of airstrikes.

To all Houthi terrorists, your time is up & your attacks must stop, starting today. If they don’t, hell will rain down upon you like nothing you’ve seen before!”