Daijiworld Media Network - Colombo
Colombo, Mar 5: Tensions in the Indian Ocean Region escalated sharply after a United States naval submarine strike sank the Iranian warship Dena in international waters off Sri Lanka’s southern coast, even as attention shifted to an Iranian military tanker anchored close to Colombo.
The Iranian corvette was reportedly torpedoed around 50 nautical miles off Galle by a US Virginia-class nuclear attack submarine operating in international waters. Defence sources indicated that the strike came amid an intensifying maritime confrontation between the US and Iran, following Iranian attempts to target US strike groups and commercial shipping in the Strait of Hormuz.

While the sinking occurred on the high seas, strategic focus has now turned to the Iranian military tanker Busheir, which is anchored approximately 10 nautical miles off the outer anchorage of Colombo Port — well within Sri Lanka’s territorial waters. Security agencies are closely monitoring the vessel, given the rapidly evolving regional security situation.
Military analysts note that India has no direct role in the engagement, as it is not a party to the ongoing hostilities between Washington and Tehran. Retired naval officials pointed out that under international maritime law, a warship engaged in active hostilities may be considered a legitimate target if involved in combat operations.
The latest strike forms part of a broader US campaign aimed at neutralising Iranian naval capabilities after Tehran allegedly deployed drones and missiles against vessels in the Gulf region. Reports suggest that multiple Iranian warships have been targeted in recent days as the confrontation widened.
The weakened Iranian leadership, following the reported decimation of senior command structures last month, is said to be attempting to broaden the conflict by exerting pressure on Gulf nations hosting US bases. Tehran has warned regional powers against siding with Washington, even as Gulf countries have reportedly intercepted incoming drones and missiles.
Despite sustained US and Israeli air operations, defence observers believe that the prospect of regime change in Tehran remains uncertain. The Islamic Revolutionary Guard Corps (IRGC) and affiliated units continue to demonstrate operational capacity, including missile launches extending towards parts of West Asia.
Strategic experts suggest that the most likely outcome may be a return to negotiations aimed at curbing Iran’s nuclear and missile programmes, as both sides weigh the costs of prolonged conflict. Notably, Iran’s key allies, China and Russia, have so far limited their involvement to diplomatic statements, avoiding direct military engagement.
With maritime routes across the Indian Ocean and Gulf under heightened alert, regional governments are maintaining close watch on developments, particularly with foreign military vessels operating near critical shipping lanes.