NEWSAR
Multi-perspective news intelligence
SRCThe Guardian - World News
LANGEN
LEANCenter-Left
WORDS704
ENT11
WED · 2026-03-04 · 13:33 GMTBRIEF NSR-2026-0304-21426
News/Bodies of 84 Iranian sailors killed in U/US submarine sank Iranian warship off Sri Lanka’s coast, Heg…
NSR-2026-0304-21426News Report·EN·Conflict

US submarine sank Iranian warship off Sri Lanka’s coast, Hegseth says

According to the US Secretary of Defense, a US submarine torpedoed and sank an Iranian warship, the Iris Dena, off the coast of Sri Lanka on Tuesday night. The attack resulted in the deaths of over 80 Iranian sailors.

Hannah Ellis-Petersen in Delhi and Aanya Wipulasena in ColomboThe Guardian - World NewsFiled 2026-03-04 · 13:33 GMTLean · Center-LeftRead · 3 min
US submarine sank Iranian warship off Sri Lanka’s coast, Hegseth says
The Guardian - World NewsFIG 01
Reading time
3min
Word count
704words
Sources cited
7cited
Entities identified
11entities
Quality score
100%
§ 01

Briefing Summary

AI-generated
NEWSAR · AI

According to the US Secretary of Defense, a US submarine torpedoed and sank an Iranian warship, the Iris Dena, off the coast of Sri Lanka on Tuesday night. The attack resulted in the deaths of over 80 Iranian sailors. Sri Lanka's coastguard received a distress call and dispatched naval vessels to the scene, which was located 44 nautical miles from Galle, within Sri Lanka's economic zone but outside its territorial waters. The attack marks an escalation in hostilities between the US and Iran amid the ongoing war in the Middle East and is the first US military action against Iran outside of that region since the conflict began. The Iris Dena, a modern frigate equipped with various missiles and weaponry, was likely returning from an international fleet review hosted by the Indian navy.

Confidence 0.90Sources 7Claims 5Entities 11
§ 02

Article analysis

Model · rule-based
Framing
Conflict
National Security
Tone
Mixed Tone
AI-assessed
CalmNeutralAlarmist
Factuality
0.70 / 1.00
Factual
LowHigh
Sources cited
7
Well sourced
FewMany
§ 03

Key claims

5 extracted
01

Sri Lanka received a distress call from an Iranian navy ship, the Iris Dena, at 5.08am on Wednesday.

factualVijitha Herath, Sri Lanka’s foreign affairs minister
Confidence
1.00
02

83 bodies had been recovered from the site of the strike.

factualAruna Jayasekara, Sri Lanka’s deputy minister of defence
Confidence
1.00
03

The Iranian ship was 44 nautical miles (81km) off the southern coastal city of Galle.

factualnull
Confidence
1.00
04

The Iris Dena warship was the newest frigate in the Iranian naval fleet.

factualnull
Confidence
0.90
05

US submarine sank an Iranian warship off Sri Lanka’s coast.

quotePete Hegseth
Confidence
0.80
§ 04

Full report

3 min read · 704 words
The US has carried out a submarine torpedo strike that sank an Iranian warship off the south coast of Sri Lanka, according to the US secretary of defence.Pete Hegseth confirmed that the US was behind the deadly strike on an Iranian frigate that killed more than 80 people, as it was sailing close to the Sri Lankan coast.“An American submarine sunk an Iranian warship that thought it was safe in international waters,” Hegseth said. He said the attack was carried out by a US navy submarine late on Tuesday night. It was one of the few instances of a submarine sinking a ship since the second world war.“It was sunk by a torpedo, a quiet death – the first sinking of an enemy ship by a torpedo since world war II,” said Hegseth. “Like in that war, back when we were still the war department, we are fighting to win.”According to Sri Lanka’s foreign affairs minister, Vijitha Herath, the Sri Lankan coastguard received a distress call from an Iranian Navy ship, the IRIS Dena, at 5.08am on Wednesday. Crew members had described the incident as an explosion.“By 6am we dispatched a naval vessel and by 7am the second naval vessel,” Herath said. He said Sri Lanka had an obligation to respond to their call for help as the country was a signatory to the international convention on maritime search and rescue.The Iranian ship was outside Sri Lanka’s territorial waters but still within its economic zone, 44 nautical miles (81km) off the southern coastal city of Galle.Aruna Jayasekara, Sri Lanka’s deputy minister of defence, confirmed that 83 bodies had been recovered from the site of the strike. According to officials, 32 of the crew were rescued alive and taken to a hospital in Galle.The deadly strike comes amid the war in the Middle East, after the US and Israel launched joint strikes on Iran over the weekend. The submarine strike marks an escalation in hostilities and is the first US attack on Iran’s military to take place outside the Middle East since the war began.The IRIS Dena warship was the newest frigate in the Iranian naval fleet and was equipped with surface-to-air missiles, anti-ship missiles, cannon, machine guns and torpedo launchers. The vessel was probably passing by Sri Lanka as it returned from the international fleet review, which was hosted by the Indian navy last week.The IRIS Dena, berthed in Rio de Janeiro, in February 2023. Photograph: Ricardo Moraes/ReutersThe Sri Lanka navy spokesperson Buddhika Sampath said rescue efforts were continuing and the main focus of the operation was to “help survivors”.A senior Sri Lankan official told the Guardian the Iranian embassy in Colombo had indicated through back channels that they believed their ship had been targeted by a US strike.The official said the Iranians claimed that the ship’s defence and counterattack capabilities were disabled by electromagnetic means before the attack. The Iranian government has yet to officially comment on the incident.Another Sri Lankan defence source said it appeared that the vessel had been hit by two torpedoes that struck the middle of the ship.Rohan Gunaratna, a well-connected Sri Lankan defence analyst, confirmed he had been informed that the ship had been targeted by the US in a torpedo attack from a submarine.The main US naval base in the Indian Ocean is Diego Garcia, located in the Chagos archipelago, more than 1,000 miles (1,600km) away from Sri Lanka.The US involvement in the targeting of the Iranian ship signals a further escalation of its military attacks on Iran. The heavy bombardment has already killed Iran’s supreme leader, Ayatollah Ali Khamenei, and dozens of other high-ranking Iranian officials, as well as targeting Iran’s ballistic missile and air defence systems.In response, Iran launched missile strikes across the Middle East and halted all shipments through the strait of Hormuz, the world’s most critical oil-shipping corridor. The strikes continued into a fifth day on Wednesday, as Israel launched a further wave of strikes on the Iranian capital, Tehran.On Wednesday, Sri Lanka’s president, Anura Kumara Dissanayake, tweeted his solidarity with the United Arab Emirates after it was targeted in retaliatory strikes by Iran, stating that Sri Lanka “stands firmly with the UAE and is ready to assist in any way it can”.
§ 05

Entities

11 identified
§ 06

Keywords & salience

7 terms
torpedo strike
0.90
us submarine strike
0.90
iranian warship
0.80
middle east conflict
0.80
sri lanka coast
0.70
us-iran tensions
0.70
sri lankan navy
0.60
§ 07

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