06.06.2026
iris dena — CA news
The IRIS Dena, an Iranian warship, sank after being struck by a U.S. submarine off the coast of Sri Lanka, resulting in significant casualties.

Breaking Development

On March 4, 2026, the Iranian warship IRIS Dena sank after being struck by a U.S. submarine in international waters off the coast of Sri Lanka. The incident occurred during the early morning hours, with a distress call sent out between 6 am and 7 am.

Immediate Circumstances

Reports indicate that at least 80 people were killed in the strike, while Sri Lankan authorities have recovered 87 bodies and rescued 32 wounded sailors. The IRIS Dena had approximately 180 crew members on board at the time of the incident, and about 60 individuals are still unaccounted for.

The sinking of the IRIS Dena follows its participation in a naval drill in the Bay of Bengal from February 18 to February 25, 2026. It was returning from the 2026 International Fleet Review in Vishakapatnam, India, when the attack occurred. This event has been characterized by U.S. Defense Secretary Pete Hegseth as the first attack on an enemy since World War II.

General Dan Caine stated, “This is an incredible demonstration of America’s global reach to hunt, find and kill an out-of-area destroyer.” Hegseth further remarked, “An American submarine sank an Iranian warship that thought it was safe in international waters.” Survivors, including the commander of the IRIS Dena, have reported finding people floating in the water and rescuing them.

Details remain unconfirmed regarding the exact circumstances leading to the sinking and the total number of casualties and survivors. The situation continues to develop as authorities assess the aftermath of this significant military incident.