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

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

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

A submarine attack on an Iranian destroyer proximate to Sri Lanka represents more than a discrete naval engagement; it signals a potential horizontal escalation of conflict into the wider Indian Ocean Region (IOR).

The US submarine strike on an Iranian warship in the Indian Ocean marked a sharp escalation in the war between the two nations, raising fresh security and economic risks for governments across the Indo-Pacific.

A U.S. Navy submarine has sunk an Iranian warship, the Dena, operating in the Indian Ocean near Sri Lanka. The ship had a complement of approximately 180 sailors. War is hell, especially for sailors stuck on sinking ships.

Legal experts say a U.S. submarine’s deadly attack on an Iranian warship does not appear to have violated international or American military law.

President Anura Kumara Dissanayake says Colombo preparing to safely evacuate 208 personnel stranded on Iranian ship IRIS Bushehr - Anadolu Ajansı

Sri Lanka sent jets to rescue crew of Iranian ship 'Iris Dena' after it sounded a distress call. Sri Lanka denied that the ship was hit by a submarine attack.

Tensions in the Persian Gulf have risen sharply. Iranian forces have blocked 38 Indian commercial vessels from continuing their journey. Iran has accused India of helping the United States locate and destroy a major Iranian naval ship.