Tragedy in the Indian Ocean: 87 Dead as US Submarine Sinks Iranian Warship off Sri Lanka

In a dramatic and deadly escalation of the ongoing conflict in the Middle East, a United States submarine has used a torpedo to sink one of Iran’s most modern warships. The attack took place in international waters off the southern coast of Sri Lanka, leaving dozens dead and sparking a massive search-and-rescue operation by the Sri Lankan Navy.

As of Wednesday, March 4, 2026, Sri Lankan officials confirmed they had recovered 87 bodies from the water. While 32 sailors were rescued alive, many more remain missing. The sinking of the IRIS Dena is being described as a turning point in the five-day-old war, marking a significant expansion of the conflict far beyond the borders of the Middle East.

The Attack in the Deep

The IRIS Dena, which Iran considered a "prize ship" and a symbol of its growing naval power, was sailing through the Indian Ocean when it was targeted. According to the United States Department of Defense, a US submarine tracked the vessel before firing a torpedo that caused a massive underwater explosion.

A video released by the Pentagon on the social media platform X (formerly Twitter) captured the final moments of the warship. In the footage, a huge plume of water rises into the air as the ship is hit. The force of the explosion was so great that the Iranian vessel appeared to break apart almost instantly.

US Defense Secretary Pete Hegseth confirmed the strike during a press briefing at the Pentagon. He stated that the Iranian navy had wrongly assumed its ships were safe because they were in international waters, far from the primary zones of conflict. "An American submarine sunk an Iranian warship that thought it was safe," Hegseth said. "Instead, it was sunk by a torpedo."

Sri Lanka’s Desperate Rescue Mission

The first signs of the disaster reached the Sri Lankan authorities through a distress signal sent by the IRIS Dena. The ship was carrying an estimated 180 people at the time of the attack. In response, the Sri Lankan government dispatched a fleet of ships and aircraft to the location to search for survivors.

Vijitha Herath, Sri Lanka’s Foreign Minister, informed Parliament that the country’s navy acted quickly to reach the site. However, by the time the rescue teams arrived, the IRIS Dena had already disappeared beneath the waves. Navy spokesman Commander Buddhika Sampath described a grim scene: "There was no sign of the ship, only some oil patches and life rafts. We found people floating on the water."

The 32 survivors were pulled from the sea and rushed to the port city of Galle. From there, they were taken to the National Hospital, where a heavy security presence of police and naval personnel was established to manage the situation.

Dr Anil Jasinghe, a senior health official, provided an update on the condition of the survivors. He noted that while many were being treated for minor injuries and shock, one sailor remained in critical condition and seven others required emergency medical intervention.

The Human Cost in Galle

The town of Galle, usually a popular destination for tourists, has become the centre of a sombre humanitarian effort. Residents watched as trucks carrying the bodies of the Iranian sailors arrived at the hospital. Because the facility’s morgue was unable to handle such a high number of casualties at once, a makeshift mortuary had to be set up to store the remains.

As the bodies were unloaded, navy personnel worked to keep the area private, shielding the sight from the public. The recovery of 87 bodies suggests that the death toll will likely rise as the search continues for the remaining crew members who are still unaccounted for.

The Significance of the IRIS Dena

The IRIS Dena was not just any ship; it was one of the newest and most advanced additions to the Iranian fleet. Equipped with heavy guns, anti-ship missiles, and surface-to-air missiles, it was designed to project Iranian power across the globe. It even had the capacity to carry a helicopter for scouting and transport.

However, the ship also had a controversial history. In February 2023, the IRIS Dena was sanctioned by the US Treasury Department. These sanctions were linked to Iranian drone manufacturers who had supplied weapons to Russia for use in the war in Ukraine. This history made the ship a high-profile target for US forces.

The sinking is also historically significant. It represents one of the very few times a submarine has sunk an enemy ship in combat since the end of the Second World War. It highlights the absolute dominance of American underwater technology in modern warfare.

A War Without Borders

The destruction of the IRIS Dena is part of a broader military strategy by the United States and Israel to dismantle Iran’s military infrastructure. US President Donald Trump has stated that a primary goal of the current war is to "wipe out" the Iranian navy entirely.

According to US Admiral Brad Cooper, head of the American military’s Central Command, at least 17 Iranian naval vessels have been destroyed since the war began five days ago. The US military claims it now holds "air dominance" over the region, though Hegseth admitted that stopping every single missile fired by Iran remains a challenge.

The war is also creating ripples in global politics. While the US and Israel intensify their bombardment of Iranian security forces and government symbols, other world powers are watching closely. China, for instance, expressed that it was "highly concerned" about the attacks but has so far avoided direct involvement. The delay in China’s official response suggests a cautious approach to a conflict that could easily spiral into a global crisis.

The Road Ahead

As the sun sets over the Indian Ocean, the search for more survivors continues, though hopes are fading. The 87 bodies recovered represent a devastating loss for the families of the sailors and a significant blow to the morale of the Iranian military.

The Iranian government has reacted with fury, calling for "Trump's blood" and launching retaliatory missile attacks against US bases and Israeli targets. However, Defense Secretary Hegseth remains defiant, suggesting that the Iranian military is "toast" and that the US-led operations have only just begun.

For the people of Sri Lanka, the war has literally arrived on their doorstep. While the country is not a participant in the fighting, its navy and healthcare workers are now on the front lines of the humanitarian disaster caused by the conflict. The sight of oil slicks and life rafts in the Bay of Bengal serves as a haunting reminder of how quickly modern warfare can bring tragedy to even the most peaceful corners of the world.

As Day 5 of the Iran War comes to a close, the international community remains on high alert. With the US committed to destroying Iran's naval capabilities and Iran vowing revenge, the waters of the Indian Ocean may see more blood before the conflict finds a resolution. For now, the focus remains on identifying the dead and caring for the few who survived the terrifying moment the IRIS Dena was lost to the sea.