A U.S. submarine sank an Iranian warship off the southern coast of Sri Lanka, U.S. Defense Secretary Pete Hegseth said on Wednesday, dramatically widening Washington's pursuit of the Iranian navy.
Sri Lanka's deputy foreign minister said at least 80 people were killed in the attack on the frigate IRIS Dena, which was heading back to Iranfrom an eastern Indian port.
it was sunk by a torpedo
Submarine strikes are rare these days. This move definitely signals a significant escalation in naval operations.