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DUBAI, United Arab Emirates (AP) — Yemen's Houthi rebels likely fired an Iranian-made anti-ship cruise missile at a Norwegian-flagged tanker in the Red Sea in December, an assault that now provides a public, evidence-based link between the ongoing rebel campaign against shipping and Tehran, the U.S. military says.
A report by the U.S. Defense Intelligence Agency released Wednesday linked the attack on the Strinda, which set the vessel ablaze, to Tehran, the Houthi's main backer in Yemen's nearly decadelong war. The findings correspond with those of a Norway-based insurers group that also examined debris found on the Strinda.
It comes as the Houthis continue their monthslong campaign of attacks over the Israel-Hamas war, targeting ships in the Red Sea corridor, disrupting the $1 trillion flow of goods passing through it annually while also sparking the most intense combat the U.S. Navy has seen since World War II.
Iran's mission to the United Nations, responding to questions from The Associated Press, again denied arming the Houthis despite the reports.
“We are aware that (the Houthis) have significantly developed their military capabilities relying on their very own sources,” the mission said. "The prolonged war against them is the primary factor behind the expansion of their military prowess.”
The Strinda was coming from Malaysia and was bound for the Suez Canal and then on to Italy with a cargo of palm oil when it was struck by a missile Dec. 11. The attack sparked a major fire on board that the crew later extinguished without anyone being hurt.
Debris found on board later was analyzed by the U.S. military. The DIA compared the pieces of the engine from the missile found on board to the Iranian Noor anti-ship ballistic cruise missile.
“The Iranian Tolu-4 turbojet engine, used in the Noor (missile), has unique features — including the compressor stage and stator — that are consistent with engine debris recovered from the ... Houthi attack on the M/T Strinda,” the DIA report said. A stator is the stationary portion of an engine.
Those pieces match images of a Tolu-4 engine that Iran displayed at the International Air and Space Show in Russia in 2017, the DIA said. Visually, the engines bore similarities in the photographs.
The Noor was reverse engineered by Iran from the Chinese C-802 anti-ship missile, which Iran purchased from Beijing and began testing in 1996 before transfers stopped over a U.S. pressure campaign. The Iranian version is believed to have a range of up to 170 kilometers (105 miles), with an upgraded version called the Qader having a range up to 300 kilometers (185 miles). The Houthis have a look-alike missile to the Qader called the Al-Mandeb 2 with a similar range.
The Norwegian Shipowners’ Mutual War Risks Insurance Association, known by the acronym DNK, also examined the debris following the Strinda attack. The association assessed it was “highly likely” the vessel had been hit by a C-802 or Noor anti-ship cruise missile.
Before the Houthis swept into Yemen's capital, Sanaa, in 2014, the country did not have an arsenal of C-802 missiles. As the Saudi-led coalition entered Yemen’s conflict on behalf of its exiled government in 2015, the Houthis’ arsenal was increasingly targeted. Soon — and despite Yemen having no indigenous missile manufacturing infrastructure — newer missiles made their way into rebel hands.
Iran long has denied arming the Houthis, likely because of a yearslong United Nations arms embargo on the rebels. However, the U.S. and its allies have seized multiple arms shipments bound for the rebels in Mideast waters. Weapons experts as well have tied Houthi arms seized on the battlefield back to Iran.
While the U.S. has previously accused Iran of supplying the missiles the Houthis use in their attacks at sea, Wednesday's report provided photographic evidence for the first time. The report pointed to a seizure stemming from a Jan. 11 nighttime raid of an Iranian dhow traveling near the coast of Somalia, which saw two Navy SEALs killed. The Navy seized parts related to the Noor anti-ship cruise missile, the report said.
The Houthis have launched seaborne attacks since 2016, when they hit the Emirati vessel SWIFT-1 with a missile as it sailed back and forth in the Red Sea between an Emirati troop base in Eritrea and Yemen. They also tried to attack the USS Mason, an Arleigh Burke-class guided missile destroyer, around the same time.
But the Houthi attacks have rapidly escalated since November over the Israel-Hamas war in the Gaza Strip. The rebels have targeted more than 70 vessels by firing missiles and drones in their campaign that has killed four sailors. They have seized one vessel and sank two in the time since.
The Houthis maintain that their attacks target ships linked to Israel, the United States or Britain as part of the rebels’ support for the militant group Hamas in its war against Israel. However, many of the ships attacked have little or no connection to the war — including some bound for Iran, which backs the Houthis.
“The Houthis probably have used Iran-supplied weapons to conduct more than 100 attacks against land-based targets in Israel, Saudi Arabia, the United Arab Emirates, and Yemen and dozens of attacks targeting ships in the Red Sea and Gulf of Aden,” the DIA report said.
Meanwhile early Friday, the private security firm Ambrey reported that a ship traveling in the southern Red Sea saw what appeared to be a missile splash into the sea and another explode in the air nearby.
The U.S. military's Central Command meanwhile reported that it destroyed five Houthi drone boats and two airborne drones in the Red Sea, while destroying another drone in Houthi-controlled territory.
The Houthis did not immediately acknowledge either incident, though it said U.S.-led airstrikes had targeted the Hodeida region Thursday.
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Nasser Karimi in Tehran, Iran, contributed to this report.