Pete Hegseth said the strike is ‘the first sinking of an enemy ship by a torpedo since World War Two
An Iranian warship has been sunk by a US submarine in the Indian Ocean, Pete Hegseth has confirmed.
The US Secretary of Defence said the strike is ‘the first sinking of an enemy ship by a torpedo since World War Two’. It comes after Sri Lanka’s navy and air force on Wednesday launched a joint rescue operation after the Iris Dena, ran aground off the southern coast of the island nation near the city of Galle.
More than 140 people are thought to be missing, with 32 so far rescued, Sri Lanka said.
The sinking was confirmed by Mr Hegseth during a press conference on Wednesday afternoon, UK time. Speaking to reporters at The Pentagon, he said: “An American submarine sunk an Iranian warship that thought it was safe in international waters.
“Instead, it was sunk by a torpedo.”
The Iris Dena is a Moudge-class frigate serving in the Southern Fleet of the Iranian Navy. It is thought to be one of Iran’s newest warships.
The US military said previously it had already destroyed 17 Iranian vessels, and that its goal was sinking “the entire navy”.
It comes after US and Israeli strikes on Iran continued on Wednesday. Retaliatory missile and drone attacks from Iran are also being launched at countries across the Middle East – with Dubai, Oman and Kuwait among those targeted.
During Prime Minister’s Questions on Wednesday lunchtime, Sir Keir Starmer said the crisis in the Middle East required a “cool head” as he defended his response to the situation.
He had come under fire from US President Donald Trump over his initial refusal to allow British bases to be used in the attack on Iran, while the Government has been criticised for failing to protect RAF Akrotiri from a drone attack.
At PMQs, Sir Keir insisted he was focused on protecting British lives and helping to get people stranded in the Middle East back home.
And he said a range of military assets including F-35 jets were already in the region.
Sir Keir said: “This Government will be resolute in our focus, protecting British lives, bringing our people home, and safeguarding our national interest.”
He told MPs “the whole country is worried about the potential for escalation” in the Middle East, and “we need to act, therefore, with clarity, with purpose, and with a cool head”.
The UK’s airbases, including Diego Garcia in the Indian Ocean and RAF Fairford in Gloucestershire, were initially denied to the US for their strikes against the Iranian regime.

