A U.S. Navy attack submarine torpedoed and sank an Iranian warship Tuesday in the Indian Ocean, marking a dramatic escalation in the rapidly expanding conflict between the United States and Iran.
Defense officials said the submarine targeted the Iranian frigate IRIS Dena as it transited international waters south of Sri Lanka. A single torpedo struck the vessel, which sank within minutes, according to U.S. military briefings. Sri Lankan authorities later confirmed dozens of fatalities and reported that survivors were rescued from the water by regional ships responding to distress calls.
At a Pentagon press conference, Defense Secretary Pete Hegseth described the strike as a “decisive defensive action,” stating that U.S. intelligence assessed the frigate posed a threat amid ongoing hostilities. He emphasized that the submarine crew acted under established rules of engagement.
The sinking is part of a broader campaign known as Operation Epic Fury, a coordinated U.S.–allied effort targeting Iranian military assets. Officials say the operation has included airstrikes on infrastructure and naval engagements across multiple regions. Tuesday’s attack marked the first confirmed wartime torpedo sinking of an enemy warship by a U.S. submarine in decades.
Iranian state media condemned the strike as an act of aggression and vowed retaliation, while regional governments expressed concern that the conflict is spreading beyond the Middle East into vital international shipping lanes. Global markets reacted swiftly, with oil prices rising amid fears of disruptions to maritime trade routes.
Military analysts say the use of a stealth submarine underscores Washington’s intent to project power while limiting risk to surface forces. However, they also warn that underwater warfare carries significant escalation risks, particularly if retaliatory strikes target U.S. naval assets.
As diplomatic channels strain and naval forces reposition across the region, Tuesday’s события signal a widening confrontation whose consequences may extend far beyond the Indian Ocean.
