US pressing Sri Lanka not to repatriate Iranian crew and survivors from sunken ship, memo says

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Sri Lanka Navy personnel assist Iranian sailors during a rescue operation after responding to a distress call from their vessel, the Iranian military ship, IRIS Dena, while at sea within Sri Lanka’s maritime search and rescue region, in Indian Ocean, Sri Lanka, March 4, 2026. Sri Lanka Navy/Handout via REUTERS

Sri Lankan navy personnel rescuing Iranian sailors from the IRIS Dena on March 4, after it was torpedoed by the US military.

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  • The US urged Sri Lanka not to repatriate survivors from the sunken IRIS Dena and the crew of the IRIS Booshehr.
  • A US submarine sank the Iranian warship IRIS Dena off Sri Lanka, marking the first such US action since WWII.
  • Sri Lanka is holding the IRIS Booshehr and its crew, with the US discouraging their use for Iranian propaganda.

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- The US is pressing Sri Lanka’s government not to repatriate the survivors from the Iranian warship it sank this week, as well as the crew of a second Iranian ship that is in Sri Lankan custody, according to an internal State Department cable seen by Reuters on March 6.

A US submarine sank the IRIS Dena warship in the Indian Ocean about 19 nautical miles off Sri Lanka’s southern port city of Galle on March 4, killing dozens of sailors and dramatically widening Washington’s pursuit of the Iranian navy.

On March 5, Sri Lanka began offloading 208 crew members from a second Iranian ship, the naval auxiliary vessel IRIS Booshehr, which found itself stranded in Sri Lanka’s exclusive economic zone but outside its maritime boundary.

Sri Lankan President Anura Kumara Dissanayake said his island nation had a “humanitarian responsibility” to take in the crew.

About 20 of the 32 Dena survivors were moved to a Sri Lankan air force camp in Koggala after being discharged from the Galle hospital some 15km away, two military sources and one hospital source told Reuters.

The torpedoing of the Dena – which US Defence Secretary Pete Hegseth described as “quiet death” – was the first such action by the US since World War II and a clear sign of the Iran conflict’s widening geographic scope.

The internal State Department cable – which was dated March 6 and has not been previously reported – said Ms Jayne Howell, the charge d’affaires at the US embassy in Colombo, had emphasised to Sri Lanka’s government that neither the Booshehr crew nor the 32 Dena survivors should be repatriated to Iran.

It said: “Sri Lankan authorities should minimise Iranian attempts to use the detainees for propaganda.”

The State Department did not immediately respond to a request for comment.

Representatives for Mr Dissanayake’s office and Sri Lanka’s Foreign Ministry were not immediately available for comment.

The cable said Ms Howell also told the Israeli ambassador to India and Sri Lanka there was no plan to repatriate the crew to Iran. The envoy asked Ms Howell whether there was any engagement with the crew to encourage “defection”, the cable said.

A representative for the Israeli embassy in New Delhi did not immediately respond to a request for comment.

On March 4, Sri Lanka’s Deputy Minister for Health and Mass Media, Dr Hansaka Wijemuni, told Reuters that Tehran had asked Colombo for help repatriating the bodies of those killed aboard the Dena, but a timeframe to do so had not yet been determined.

The Dena had taken part in naval exercises organised by India in the Bay of Bengal in February and was returning to Iran when it was struck by a US torpedo.

A US official, speaking on condition of anonymity, told Reuters the Dena was armed when it was hit and the US did not provide a warning before carrying out the strike.

The State Department cable said the second vessel, the Booshehr, will remain in Sri Lankan custody for the duration of the conflict.

The Sri Lankan authorities said on March 6 that they were escorting the Booshehr to a harbour on the eastern coast and moving most of its crew to a navy camp near Colombo. REUTERS

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