Ten crew members have been rescued and at least three others killed after a cargo ship was attacked by Yemen's Houthi rebels.
The Liberian-flagged, Greek-operated Eternity C was carrying 25 crew when it sustained significant damage and sank in the Red Sea, a European naval mission says.
It lost all propulsion after being hit by rocket-propelled grenades fired from small boats, according to the UK Maritime Trade Operations (UKMTO) agency.
The attack continued as search rescue operations commenced.
The Iran-backed Houthis said they attacked the Eternity C because it was heading to Israel, and that they took an unspecified number of crew to a "safe location
The US embassy in Yemen said the Houthis had "kidnapped many surviving crew members" and called for their immediate release.
Authorities in the Philippines said 21 of the crew were citizens. Another of them is a Russian national who was severely wounded in the attack and lost a leg.
Greece-based maritime security firm Diaplous released a video on Wednesday that showed the rescue of at least five seafarers who it said had spent more than 24 hours in the water.
A passing merchant vessel safely rescued all 22 crew of Magic Seas.
Since November 2023, the Houthis have targeted around 70 merchant vessels with missiles, drones and small boat attacks in the Red Sea and the Gulf of Aden
They have now sunk four ships, seized a fifth, and killed at least seven crew-members.
The group has said it is acting in support of the Palestinians in the war between Israel and Hamas in Gaza, they claim to target ships only linked to Israel, the US or the UK, who have carried out air strikes on Yemen in response.