At least 80 sailors were killed after a US submarine attack on an Iranian ship off Sri Lanka's coast.
This is the first time a submersible has destroyed a navy vessel in a war in decades.
US Gen Dan Caine, the Pentagon’s top officer, said a fast-attack submarine had used a single torpedo to hit the vessel. Defence Secretary Pete Hegseth said the Iranian warship “thought it was safe in international waters. Instead, it was sunk by a torpedo.”
Sri Lanka's deputy foreign minister told local television the ship was returning from eastern India.
Earlier, Sri Lanka's military said it had rescued at least 30 people, while at least 101 sailors were missing and 78 wounded. Foreign Minister Vijitha Herath told parliament that injured sailors were taken to hospital in the island's south.
Sri Lankan media said the ship made a distress call off the coast of Galle in the southern part of the country and that the injured had been admitted to hospital there for treatment.
In parliament, a member of the opposition asked whether the vessel had been bombed as part of the US-Israeli attacks on Iran, but there was no immediate response from the government.
Navy spokesman Buddhika Sampath said the rescue operation was in line with Sri Lanka's maritime obligations, although the incident took place outside its waters.
Rescue boats that reached the site did not see the ship and observed only an oil slick, he said.
The conflict between the US, Israel and Iran has escalated into a regional war after coordinated strikes were launched on Iran on Saturday.
The joint operation, code-named Operation Epic Fury by the US and Operation Roaring Lion by Israel, has entered its fifth day, with hundreds of Iranian military sites being attacked and the regime's leadership targeted.
