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

A U.S. Navy submarine has sunk an Iranian warship, the Dena, operating in the Indian Ocean near Sri Lanka. The ship had a ...

Second Iranian ship enters Sri Lankan waters after US submarine attack, say officials - It comes a day after US forces ...

Prime Minister Anthony Albanese’s disclosure about the attack in the Indian Ocean prompted concern that Australia’s close ...

A U.S. submarine's deadly attack on an Iranian warship does not appear to have violated international or American military ...

The Iranian warship that was sunk in the Indian Ocean likely didn’t have the technology needed to defend itself against ...

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.

Video of a US submarine sinking an Iranian warship looked "remarkably similar" to a 1945 US submarine attack, a World War II ...

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

Legal experts conclude that the U.S. submarine's attack on the IRIS Dena likely complies with international law, though ...

Australian Prime Minister Anthony Albanese speaks at the Sydney Opera House during a National Day of Mourning for the victims ...

The U.S. and Israel struck Tehran and other Iranian cities in airstrikes on the fifth day of the war with Iran. Here's what you need to know.