The United Kingdom Maritime Trade Operations (UKMTO) said on Tuesday that it had received a report that a vessel had been boarded off Somalia by multiple people who were now in control of it.
UKMTO earlier flagged a boarding incident 600 nautical miles east of Somalia's capital Mogadishu.
"Unauthorized persons now have control of the vessel," UKMTO said in a statement, adding that the people who had boarded the vessel came from one small and one large craft.
British maritime security firm Ambrey said separately that a Bangladesh-flagged bulk carrier was reportedly boarded east of Somalia.