WASHINGTON, July 23. The United States will punish Iran for any further Houthi attacks on Saudi Arabian ships, President Donald Trump said on Truth Social. Earlier on Thursday, the Houthis fired ballistic missiles and drones at two oil tankers of the kingdom, which violated their naval blockade of Saudi Arabia. On July 20, the Houthis instituted a naval blockade of Saudi Arabia, accusing the kingdom of years of "plundering Yemen's national wealth," oil included. On July 21, the Saudi-led coalition started protecting merchant ships.