Fate of 3 Iranian Warships: One Sunk by US Torpedo, Two Docked in India & Sri Lanka

The Indian Ocean has become a secondary front in the escalating conflict between Iran, Israel, and the United States. In the first week of March 2026, three Iranian naval vessels—IRIS Dena, IRIS Lavan, and IRIS Bushehr—were caught in a rapid succession of military strikes and mechanical failures that forced regional powers India and Sri Lanka into a delicate diplomatic balancing act.

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While one vessel now rests at the bottom of the ocean, the other two have sparked debate over maritime conventions versus national security.

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IRIS Dena: The “Quiet Death” Off Galle

The most violent chapter of this saga occurred on March 4. The IRIS Dena, a Moudge-class frigate that had recently participated in military exercises in Visakhapatnam, was intercepted in international waters.

• The Strike: A United States submarine fired a single torpedo, sinking the frigate 40 nautical miles off the coast of Galle.

• The Pentagon’s Stance: US Defense Secretary Pete Hegseth described the attack as a “quiet death,” asserting that the vessel was not safe despite being in international waters.

• Humanitarian Toll: Sri Lankan rescuers have recovered 87 bodies, with dozens more missing. 32 survivors are currently receiving medical treatment in Galle.

IRIS Lavan: India’s Humanitarian Permission in Kochi

Simultaneously, the IRIS Lavan sought refuge in Indian waters.

• Technical Fault: On February 28, the ship reported a malfunction. Tehran officially requested India’s help for technical checks.

• The Approval: India cleared the request on March 1, and the ship docked at Kochi Port on March 4.

• Current Status: With 183 sailors on board, the ship remains under assessment by Indian technical teams. India’s decision to allow the docking is being viewed as an adherence to international maritime law regarding vessels in distress.

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IRIS Bushehr: Sri Lanka Takes Custody

The third vessel, the IRIS Bushehr, reported engine failure shortly after the Dena was sunk.

• Security Move: Given the high tensions, the Sri Lankan Navy did not just provide a dock; they took custody of the vessel.

• Sailor Transfer: 204 sailors were moved to the Welisara Naval Base for medical and border control checks.

• Trincomalee Bound: The ship is expected to be moved to the strategic eastern port of Trincomalee for further investigation.

Reality Check

The US strike on the IRIS Dena is a massive escalation of the Iran war. Still, India and Sri Lanka are following the “Law of the Sea” by allowing distressed ships to dock. Therefore, while the US is actively sinking Iranian assets, regional powers are prioritizing humanitarian and maritime protocols to avoid being branded as combatants. In fact, India’s permission for the IRIS Lavan to dock in Kochi is a high-risk move that could draw diplomatic heat from Washington.

The Loopholes

The US claims the sinking was a “lawful” act in international waters. In fact, this is a “Naval Warfare Loophole”—international law usually protects non-combatant passage, but the US is treating the entire Indian Ocean as a “theatre of war” due to Iran’s recent actions. Therefore, no Iranian state vessel is currently considered safe. Still, the “Kochi Loophole” remains; by allowing the Lavan to dock for “technical repairs,” India is essentially providing a “safe zone” that the US cannot strike without violating Indian sovereignty.

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What This Means for You

If you live in coastal Kerala or Sri Lanka, expect increased naval patrols. First, realize that the presence of Iranian warships in Kochi and Colombo makes these ports high-security zones. Then, if you are a traveler, understand that maritime tourism and fishing near Galle may be restricted for several weeks as search-and-recovery operations for the IRIS Dena continue.

Finally, understand that oil prices may fluctuate. You should keep an eye on fuel costs as conflict in these vital shipping lanes usually leads to higher insurance premiums for tankers. Before you plan any sea travel, check for Indian Coast Guard advisories regarding the “Zone of Conflict” in the Laccadive Sea.

What’s Next

The Indian Ministry of External Affairs is expected to issue a formal statement on the IRIS Lavan by Monday. Then, look for the UN Security Council to debate the legality of the torpedo strike on the Dena. Finally, expect the IRIS Bushehr to be towed to Trincomalee by mid-week, where international observers may request access to its cargo.

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