The Pentagon has not said which American submarine fired the torpedo, except to say it was a fast-attack submarine.

The submarine, which is currently docked at Pearl Harbor, is the fourth U.S. military vessel to be named after the Queen City.

Second Iranian ship enters Sri Lankan waters after US submarine attack, say officials - It comes a day after US forces torpedoed an Iranian vessel off the coast of Sri Lanka

US Secretary of Defense Pete Hegseth said Wednesday that a US submarine sank an Iranian warship in international waters after Sri Lanka’s Navy said it rescued more than two dozen people from an Iranian vessel that was sunk off its shoreline.

A retired U.S. Navy nuclear submarine commander is offering his perspective on Tuesday's torpedo attack that sank an Iranian warship in the Indian Ocean.

Sri Lanka on Wednesday said it had recovered over 80 bodies of Iranian sailors killed after a US submarine attack sank the Iranian frigate - IRIS Dena - off Galle, the island's southern coastal town.

Beijing is working to ramp up production of nuclear-powered attack boats and incorporate larger numbers of guided-missile classes into its submarine force, putting the People’s Liberation Army Navy on the path to credibly challenge U.

Since 1991, Navy subs have launched scores of cruise missiles in combat, but the torpedo attack off Sri Lanka is a return to form after 80 years.

While it’s been almost a century since the last kill by an American submarine, other navies have done so more recently.