A day after a US submarine sunk an Iranian Navy warship off the coast of Sri Lanka, the Foreign Minister of Iran, Sayed Abbas Araghchi, has warned that the US would “pay bitterly” for targeting a ship in international waters, The Tribune has reported.

Araghchi posted on social media platform X on Thursday saying, “The US has perpetrated an atrocity at sea, 2,000 miles away from Iran’s shores.”

The frigate IRIS Dena, a guest of India’s Navy carrying almost 130 sailors, was struck in international waters without warning, said the Iran Foreign Minister, adding, “Mark my words: The US will come to bitterly regret the precedent it has set.”

US Secretary of War, Pete Hegseth, on Wednesday confirmed that a US submarine fired a torpedo and sank the Iranian Navy vessel IRIS Dena west of Sri Lanka.

In a way, the Iran and US-Israel conflict has reached close to the Indian coast. The strike today at sea was almost 4,000 kms away from Iran, significantly expanding the radius of war. Already, fearing Iranian missile strikes, several US warships have moved eastward towards India.

These ships are in international waters. India has denied that any US Navy assets were using Indian ports. The Iranian ship, hit on Wednesday, was returning after participating in the international fleet review and exercise Milan hosted by India at Visakhapatnam.

The Iranian ship went down with almost 130 sailors on board missing. The Sri Lankan Navy, acting on a distress call, rescued 32 of the Iranian sailors. Hegseth confirmed the act by the US forces, saying the ship was hit in the Indian Ocean, stating, “an Iranian warship that thought it was safe in international waters. .. Instead, it was sunk by a torpedo”.

Hegseth did not name the Iranian ship that was attacked. But earlier, the Sri Lankan Navy reported the distress call from IRIS Dena when it was some 40 kms west of Galle, located on the south-western part of the island country. On February 16, the Iranian ship had sailed into the port of Visakhapatnam, where seventy-four nations participated.

Warships from Australia, Japan, South Korea, Russia, and dozens of others were anchored alongside the now-sunk Iranian vessel. Iran’s Navy Commander, Rear Admiral Shahram Irani, held talks with India’s Chief of Naval Staff on strengthening maritime security cooperation.

The theme was “United through Oceans.” Notably, the US Navy was supposed to send the guided-missile destroyer USS Pinckney to the exercise Milan; however, the ship was diverted to Singapore on February 15. The US did not field its warship in Milan, which had ships from Russia and Iran.

The exercise ended on February 25. Three days later, on February 28, the United States and Israel launched Operation Epic Fury. The IRIS Dena was transiting home. This morning at 5:08 a.m. local time, the IRIS Dena issued a distress call. Sri Lanka’s Foreign Minister, Vijitha Herath, informed parliament that two navy vessels and an aircraft were deployed. Thirty crew members were rescued and admitted to Karapitiya Hospital in Galle.

The Straits Times reported 32 critically wounded survivors. Reuters reported 101 missing and 78 wounded. The Sri Lankan Navy spokesman said the operation was conducted in line with the International Convention on Maritime Search and Rescue.