A vessel sailing off southern Yemen reported an explosion nearby on Sunday, a British maritime security agency said, the latest incident as Houthi rebels continue to attack shipping on the vital Red Sea route. United Kingdom Marine Trade Operations said a commercial ship “has reported an explosion in close proximity to the vessel”, causing no casualties or damage. The blast hit as the ship was sailing “85 nautical miles east of Aden” in Yemen, and the vessel was “proceeding to its next port of call”, said UKMTO, which is run by the Royal Navy. It did not identify the vessel. UKMTO WARNING INCI…