The US and Britain have struck more than a dozen Houthi targets in Yemen in response to a surge in attacks by the Iran-backed militia group on ships in the Red Sea and Gulf of Aden.

It is the fourth joint action taken by the UK and the US in an attempt to deter attacks by the group on vessels, including a missile strike this week that set fire to a cargo ship.

According to US officials, American and British fighter jets hit about 18 sites across multiple locations, targeting missiles, launchers, rockets, drones and unmanned surface and underwater vehicles.

The US fighter jets launched from the USS Dwight D Eisenhower aircraft carrier, which is currently in the Red Sea.

US President Joe Biden ordered the strikes after being briefed on the targets on Friday.

l Masirah TV, the main television news outlet run by Yemen’s Iran-aligned Houthi movement, said on Saturday that US, and UK forces carried out a total of nine airstrikes in the capital, Sanaa.

The Ministry of Defence (MoD) has said the UK strikes were carrid out by four Royal Air Force Typhoon FGR4s supported by two Voyager tankers.

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The MoD said in a statement: “Intelligence analysis had successfully identified several very long-range drones, used by the Houthis for both reconnaissance and attack missions, at a former surface-to-air missile battery site several miles north-east of Sanaa.

“Our aircraft used Paveway IV precision guided bombs against the drones and their launchers, notwithstanding the Houthis’ use of the old missile battery revetments to try to protect the drones.”

The MoD said previous RAF strikes, on 11 January and 3 February, had destroyed a “number of buildings used to support” the Houthis’ “done and cruise missile operations”.

British Defence Secretary Grant Shapps posted on X after the strikes took place: “In recent days, we have seen severe Houthi attacks against commercial ships in the Red Sea and Gulf of Aden, including against the British-owned MV Islander and the MV Rubymar, which forced the crew to abandon ship.

“It is our duty to protect lives at sea and preserve freedom of navigation.

“That is why the Royal Air Force engaged in a fourth wave of precision strikes against Houthi military targets in Yemen. We acted alongside our allies to further degrade Houthi drones and launchers used to mount their dangerous attacks. I thank the brave British personnel involved for their service.”

The US has also been carrying out almost daily strikes without British support to take out Houthi targets, including incoming missiles and drones aimed at ships, as well as weapons that were prepared to launch.

The Houthis have launched at least 57 attacks on commercial and military ships in the Red Sea and Gulf of Aden since 19 November, and the pace has picked up in recent days.

“We’ve certainly seen in the past 48, 72 hours an increase in attacks from the Houthis,” Pentagon spokeswoman Sabrina Singh said in a briefing on Thursday. And she acknowledged that the Houthis have not been deterred.

“We never said we’ve wiped off the map all of their capabilities,” she told reporters.

“We know that the Houthis maintain a large arsenal. They are very capable. They have sophisticated weapons, and that’s because they continue to get them from Iran.”

There have been at least 32 US strikes in Yemen over the past month and a half; a few were conducted with allied involvement.

In addition, American warships have taken out dozens of incoming missiles, rockets and drones targeting commercial and other navy vessels.

Mr Biden and other senior leaders have repeatedly warned that the US will not tolerate the Houthi attacks against commercial shipping.

But the counter-attacks have not appeared to diminish the Houthis’ campaign against shipping in the region, which the militants say is over Israel’s war against Hamas in the Gaza Strip.