LONDON: Armed assailants are believed to have ​boarded the chemical tanker Asana off the southern coast of Yemen in the Gulf of ‌Aden on ‌Friday ​and ‌are ⁠in ​control of ⁠the vessel, maritime security sources said.

The small tanker, which had no confirmed ⁠flag, had ‌listed the ‌Somali port ​of ‌Bosaso as its ‌next destination, ship tracking data showed.

A vessel was boarded by ‌unauthorized personnel while transiting east in the ⁠Gulf ⁠of Aden, 65 nautical miles south of Yemen’s Al Mukalla port, the British navy agency UKMTO said on Friday.