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The US-Israel-Iran war · Iran

US submarine sinks Iranian frigate Dena off Sri Lanka; at least 80 killed

Confirmedon two or more distinct origins, at least one tied to no party: 2 distinct origins, 1 tied to no party.

A US submarine sank the Iranian warship IRIS Dena in the Indian Ocean off Galle, Sri Lanka, on 4 March. Sri Lankan officials said at least 80 sailors were killed and about 30 rescued, and the military said at least 101 were missing, according to The National. Defence Secretary Pete Hegseth said the ship "thought it was safe in international waters" and was sunk by a torpedo. It widened the war far beyond the Gulf.

When
4 March 2026
Where
Indian Ocean, No single country (military events are placed no finer than town or district, except known fixed sites)
What
naval incident, warship · military
Acting party
United States Armed Forces
Against
Islamic Republic of Iran Army
Attribution
Acknowledged by the acting party. Hegseth and Gen. Dan Caine said a US submarine sank the ship.
In the record
Published 2026-10-27 21:03 UTC · revision 1 · backfilled

Sources

  1. Evidence The National Media · Government of the United Arab Emirates origin: Sri Lankan foreign minister's statement to parliament · published 2026-03-04 00:00 UTC
  2. Corroboration CNN Media · Unaffiliated origin: Sri Lankan officials; Hegseth statement · published 2026-03-04 00:00 UTC

History

WhenFieldFromToWhy
2026-10-27 21:03 UTCstatusnullconfirmedP1 backfilled: researched from cited sources and graded by the one rule

Cite or reuse

The War Record, "US submarine sinks Iranian frigate Dena off Sri Lanka; at least 80 killed", ev-20261027-jxsk, revision 1, https://thewarrecord.com/events/ev-20261027-jxsk/

This month's events as JSON (id ev-20261027-jxsk) · CC BY 4.0