The Houthi militia in Yemen appears to be allowing some ships to pass through the Bab al-Mandab strait at the mouth of the Red Sea, despite its blockade of shipping to Saudi Arabia, experts said on Thursday. A Chinese oil tanker, Cosco Shipping’s VLCC Xin Long Yang, has been granted permission to pass through the waterway, according to the trade publication Lloyd’s List. It said Chinese tankers returning from the Saudi port of Yanbu in the Red Sea may be able to negotiate passage with the...