Iris Dena Warship Sunk In International Waters or Indian Territory?

Sinking of IRIS Dena

The Iranian frigate IRIS Dena sank in the Indian Ocean on March 4, 2026, after being torpedoed by a US submarine. The attack occurred in international waters off Sri Lanka's southern coast, outside India's Exclusive Economic Zone (EEZ). The ship was returning to Iran after participating in the MILAN-2026 multilateral naval exercise hosted by the Indian Navy in Visakhapatnam from February 16 to 25, 2026.

Location Clarification

The sinking took place in international waters, not Indian territorial waters or EEZ. India's territorial waters extend 12 nautical miles from the baseline, while the EEZ extends 200 nautical miles. The incident was beyond both limits. India rejected claims that it allowed US attacks from its ports or territorial waters.

Casualties and Impact

Over 80 sailors were killed and 100 went missing. The ship was severely damaged and sank rapidly. Rescue efforts were hampered by the location and ongoing conflict.

India's Position

The government maintained silence on the incident but rejected allegations of complicity. The Indian Navy had welcomed the ship during its visit to Visakhapatnam. Opposition parties criticized the government for allowing the attack near Indian waters and losing regional influence.

Strategic Context

The incident is the closest the US-Iran war has come to India. IRIS Dena's participation in MILAN-2026 highlighted India's role as a naval host in the Indian Ocean. The sinking raised concerns about maritime security and India's ability to protect visiting vessels.

IN SHORTThe Iranian frigate IRIS Dena sank in the Indian Ocean after a US submarine attack on March 4, 2026. The ship had recently participated in India's MILAN-2026 naval exercise in Visakhapatnam. Confusion arose over whether the ship was in Indian territorial waters or international waters. The vessel was in international waters outside India's EEZ when attacked. India rejected claims that it allowed US attacks from its ports. The sinking killed over 80 sailors and left 100 missing. Opposition parties criticized the government for losing regional influence.

TL;DR

The Iranian frigate IRIS Dena sank in the Indian Ocean after a US submarine attack on March 4, 2026.
The ship was returning from India's MILAN-2026 naval exercise in Visakhapatnam.
The attack occurred in international waters off Sri Lanka's southern coast.
Over 80 sailors were killed and 100 went missing.
The sinking was outside India's territorial waters and EEZ.
India rejected claims that it allowed US attacks from its ports.
The Indian Navy had welcomed the ship during its visit.
Opposition parties criticized the government for losing regional influence.
The incident raised concerns about maritime security near India.
The government maintained silence but described its position as responsible diplomacy.