The United States will once again consider Yemen's Iran-backed Houthi rebels a terrorist group, US media reported, after previously dropping the classification in 2021.
The designation of the Houthis as a "specially designated global terrorist" entity comes amid attacks by the group on shipping and military vessels in the Red Sea.
It comes as the United Kingdom Maritime Trade Operations (UKMTO) organisation and British maritime security firm Ambrey said they had received reports of incidents near Yemen's Aden.
In an advisory note, UKMTO said that a ship had been attacked 60 nautical miles southeast of Aden.
The "vessel has been hit on port side by an uncrewed aerial system," it said, adding that there was a fire onboard, which had since been extinguished.
"Vessel and crew are safe and proceeding to next port of call", UKMTO later added in an updated advisory.
Ambrey said that a Marshall Islands-flagged bulk carrier was hit by an unmanned aerial vehicle 66 miles southeast of Aden as it was heading east along the Gulf of Aden.
"The vessel's gangway incurred damage, and at the time of writing it was deemed not usable," Ambrey added in its advisory note.
Yesterday, the US military said it struck Yemen to destroy four anti-ship missiles "prepared to launch from Houthi-controlled areas," and which "presented an imminent threat to both merchant and US Navy ships in the region."
It is at least the third time in less than a week that the US has carried out strikes against the Houthis, who have repeatedly taken aim at merchant vessels in the vital Red Sea shipping lane, attacks the rebels say are in support of Palestinians in Gaza, where Israel is battling militant group Hamas.
The US military also said that the Houthis launched an anti-ship ballistic missile into international shipping lanes, and that a Maltese-flagged bulk carrier reported that it was hit but remained seaworthy.
The United States and Britain targeted nearly 30 sites in Yemen with more than 150 munitions last week, while US forces later attacked a Houthi radar site in what was described as "a follow-on action" related to the previous strikes.
The United States set up a multinational naval task force last month to protect Red Sea shipping from the Houthis, who are endangering a transit route that carries up to 12% of global trade.
The Houthis say they have been targeting Israeli-linked vessels, but the US says dozens of countries have connections to ships that have been attacked.
The US had previously designated the Houthis as a terrorist group in January 2021, in the waning days of the Donald Trump administration, a move that was reversed the following month by President Joe Biden.
The original designation caused outcry from those who said it would complicate the humanitarian response in the country, battered by civil war and much of which is controlled by the Houthis.
