Ship attacked off Yemen: UK agency
A British maritime security agency on Thursday said it was investigating reports of an attack on a vessel off Yemen's lawless coast.
"Investigations are ongoing," it added.
The UKMTO is involved in anti-piracy operations and is part of the Royal Navy, which is coordinating surveillance in the region.
Previous attacks have been blamed on Somali pirates but have fallen in recent years as a result of international security operations.
Yemen is in the grip of a devastating humanitarian crisis because of fighting between Iran-supported Huthi rebels and the Saudi-backed government.
More than 150,000 people have died in the war and millions have been displaced, according to United Nations estimates.