US helicopters have repelled an attack by Iran-backed Houthi militants on a Maersk container vessel in the Red Sea, sinking three ships and killing 10 militants, according to accounts by American, Maersk, and Houthi officials.
The naval battle occurred around 3.30am on Sunday as the attackers sought to board the Singapore-flagged Maersk Hangzhou, Maersk and US Central Command (CENTCOM) said.
Helicopters from the USS Eisenhower and USS Gravely joined the ship's security team in repelling the attackers after receiving a distress call, CENTCOM said.
Maersk said it was pausing all sailing through the Red Sea for 48 hours after the attack.
A spokesman for the Houthis said the group carried out the attack because the ship's crew refused to heed warning calls. He said 10 Houthi naval personnel were "dead and missing" after their boats were attacked by US forces in the Red Sea.
The naval battle underlines the risk of a regional escalation in fighting as Israel continues with its relentless bombing campaign following a Hamas surprise cross-border attack on Israeli towns on October 7 that left 1200 dead, and took 240 hostages.
Israel's air and artillery bombardment has killed more than 21,800 people, according to Gazan health authorities.
Yemen's Houthis have been targeting vessels in the Red Sea since November to show their support for Hamas, prompting major shipping companies to take the longer and costlier route around the Africa's Cape of Good Hope rather than through the Suez Canal.
The Red Sea is the entry point for ships using the Suez Canal, which handles about 12 per cent of global trade and is vital for the movement of goods between Asia and Europe.
The US launched Operation Prosperity Guardian on December 19, saying more than 20 countries had agreed to participate in the efforts to safeguard ships in Red Sea waters near Yemen.
Maersk, one of the world's top cargo shippers, said on December 24 it would resume sailing through the Red Sea. However, attacks have continued and US allies have proven reluctant to commit to the coalition, with nearly half not declaring their presence publicly.
The botched Houthi boarding operation was the second attack on the Maersk Hangzhou in as many days. The ship, which is carrying 14,000 containers en route from Singapore, was on Saturday hit by a missile about 55 nautical miles southwest of Al Hodeidah, Yemen.
The shipping company added that the crew of the Maersk Hangzhou crew was safe and there was no indication of fire onboard the vessel, which continued its journey north towards the Suez Canal.
White House national security spokesperson John Kirby declined to say what options the US is considering when asked on ABC's Good Morning America if Washington would consider a pre-emptive strike on the Houthis.
"We have made it clear publicly to the Houthis, we've made it clear privately to our allies and partners in the region, that we take these threats seriously."
British Foreign Secretary David Cameron said on Sunday that he had told Iranian Foreign Minister Hossein Amirabdollahian in a call that Iran should help stop the Houthi attacks in the Red Sea.
"I made clear that Iran shares responsibility for preventing these attacks, given their longstanding support to the Houthis," Cameron said in a post on social media site X, adding that the attacks "threaten innocent lives and the global economy".
The BIMCO shipping association condemned the attacks and thanked those states involved in repelling them.
"We are thankful to US, French, and UK efforts so far and hope even more states will support the coalition with naval assets or other impactful means including diplomatic pressure on the Houthis and their sponsors," Jakob Larsen, BIMCO's head of maritime safety and security, told Reuters.
