RIYADH: Houthi militants from Yemen have seized a ship in the southern Red Sea, the Arab Coalition said Monday. The Iran-backed militia used two small boats to hijack the vessel as it was towing a South Korean drilling rig late on Sunday, spokesperson Col. Turki Al-Maliki said. “The Houthi militia pose a real terrorist threat to the freedom of navigation and trade,” he added. The coalition said the militia were responsible for securing the safety of all ships and crew members from any country. The Houthis have been involved in a number of attacks against shipping in the Red Sea and near the Bab Al-Mandeb Strait - a major conduit for global trade.