Dubai, March 7: A missile attack by Yemen's Houthi rebels on a commercial ship in the Gulf of Aden on Wednesday killed three of its crew members and forced survivors to abandon the vessel, the U.S. military said. It was the first fatal strike in a campaign of assaults by the Iranian-backed group over Israel's war on Hamas in the Gaza Strip.

The attack on the Barbados-flagged, Liberian-owned bulk carrier True Confidence further escalates the conflict on a crucial maritime route linking Asia and the Middle East to Europe that has disrupted global shipping. The Houthis have launched attacks since November, and the U.S. began an airstrike campaign in January that so far hasn't halted their attacks. Middle East Crisis: Cargo Ship Rubymar Sinks in Red Sea After Houthi Attack.

Meanwhile, Iran announced Wednesday that it would confiscate a $50 million cargo of Kuwaiti crude oil for American energy firm Chevron Corp. aboard a tanker it seized nearly a year earlier. It is the latest twist in a yearslong shadow war playing out in the Middle East's waterways even before the Houthi attacks began. Red Sea Crisis: Yemen's Houthis Say They Target Two US Warships.

The U.S. military's Central Command said an anti-ship ballistic missile launched from a Houthi-controlled area in Yemen struck the True Confidence, causing significant damage to the ship. In addition to the three deaths, at least four crew members were wounded, with three in critical condition.

Two aerial photos released by the U.S. military showed the the ship's bridge and cargo on board ablaze.

“These reckless attacks by the Houthis have disrupted global trade and taken the lives of international seafarers simply doing their jobs, which are some of the hardest jobs in the world, and the ones relied on by the global public for sustainment of supply chains,” Central Command said.

The attack came after the ship had been hailed over radio by men claiming to be the Yemeni military, officials said. The Houthis have been hailing ships over the radio in the Red Sea and the Gulf of Aden since beginning their attacks, with analysts suspecting the rebels want to seize the vessels.

After the missile hit, the crew abandoned the ship and deployed lifeboats. A U.S. warship and the Indian navy were on the scene, trying to assist in rescue efforts.

The ship's managers and owners said the ship's crew of 20 included one Indian, 15 Filipinos and four Vietnamese. Three armed guards, two from Sri Lanka and one from Nepal, also were on board. The ship had been carrying steel from China to Jeddah, Saudi Arabia.

The United Nations called on the Houthis “to cease all attacks against international shipping in the Red Sea,” U.N. spokesman Stephane Dujarric said, expressing serious concern about the continuing attacks, including the latest incident where the status of the crew is unknown.

Dujarric said the attacks are causing risks “to property, to life, to ecology in the area.”

At the State Department in Washington, spokesman Matthew Miller condemned the attack. “We continue to watch these reckless attacks with no regard for the well being of innocent civilians who are transiting through the Red Sea. And now they have, unfortunately and tragically, killed innocent civilians,” he told reporters.

White House press secretary Karine Jean-Pierre separately warned: “The U.S. obviously is going to continue to take action.”

Brig. Gen. Yahya Saree, a Houthi military spokesman, claimed the attack in a prerecorded message, saying its missile fire set the vessel ablaze. He said the rebels' attacks would only stop when the “siege on the Palestinian people in the Gaza is lifted.”

The rebels have repeatedly targeted ships in the Red Sea and surrounding waters over the Israel-Hamas war, but up to Wednesday hadn't killed any crew members. The vessels have included at least one with cargo bound for Iran, the Houthis' main benefactor, and an aid ship later bound for Houthi-controlled territory.

Despite more than a month and a half of U.S.-led airstrikes, Houthi rebels have remained capable of launching significant attacks. They include the attack last month on a cargo ship carrying fertilizer, the Rubymar, which sank on Saturday after drifting for several days, and the downing of an American drone worth tens of millions of dollars.

It was unclear why the Houthis targeted the True Confidence. However, it had previously been owned by Oaktree Capital Management, a Los Angeles-based fund that finances vessels on installments. Oaktree declined to comment.

Meanwhile, a separate Houthi assault Tuesday apparently targeted the USS Carney, an Arleigh Burke-class destroyer that has been involved in the American campaign against the rebels. The Carney shot down bomb-carrying drones and one anti-ship ballistic missile, Central Command said. Saree acknowledged that attack as well.

The U.S. later launched an airstrike destroying three anti-ship missiles and three bomb-carrying drone boats, Central Command said.

The Houthis haven't offered any assessment of the damage they've suffered in the American-led strikes that began in January, though they've said at least 22 of their fighters have been killed. One civilian has reportedly been killed.

The U.S. Treasury separately announced new sanctions targeting a Houthi financier and the expeditionary Quds Force of Iran's paramilitary Revolutionary Guard, which arms the rebels.

The Houthis have held Yemen's capital, Sanaa, since 2014. They've battled a Saudi-led coalition since 2015 in a long-stalemated war there.

Meanwhile, the Indian navy released a video of its sailors from the INS Kolkata fighting a fire aboard the MSC Sky II, which had been targeted by the Houthis in the Gulf of Aden on Monday. The Mediterranean Shipping Co., a Switzerland-based company, said the missile struck the ship as it was traveling from Singapore to Djibouti. No one was injured.

Iran separately announced the seizure of the crude oil aboard the Advantage Sweet through an announcement carried by the judiciary's state-run Mizan news agency. At the time, Iran alleged that the Advantage Sweet collided with another ship, without offering any evidence.

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