Yemeni fighters from the Houthi movement said they will close Saudi Arabia’s coast starting Monday. Their spokesman, Yahya Saree, called it a maritime strike. Oil tankers moving through the Red Sea near Saudi ports could face delays. U.S. warplanes kept hitting objectives after their warning. The group took several ships. Insurers now see Red Sea routes as risky. Traders are watching closely, watching for higher fees or diverted shipments. Saudi ports are close to the threatened zone, so any slowdown matters fast.