Aden -- The UK Maritime Trade Operations (UKMTO) reported an attack on a vessel in the Gulf of Aden, though the type of ship and the perpetrators remain unknown. The agency, which monitors international shipping, said it received a report of an incident about 95 nautical miles southeast of Aden, Yemen. According to the ship’s master, “a loud explosion was heard very close to the vessel.” UKMTO added that available information indicates all crew members are safe and no environmental impact has been reported. The nature of the attack has not been confirmed, though it is suspected to have involved a missile projectile.