Silent Waters, Unanswered Questions: Allegations of a Torpedo Strike Near Sri Lanka Demand Urgent Investigation
The calm waters of the northern Indian Ocean rarely reveal the violent mechanics that unfold beneath their surface. Yet a developing controversy involving the Iranian naval vessel IRIS Dena-75 and the American nuclear attack submarine USS Minnesota has triggered intense scrutiny across regional security circles, maritime law experts, and defence establishments.
At the centre of the controversy lies a troubling sequence of events reported to have occurred on 4 March 2026, during the wider confrontation linked to the ongoing Middle East conflict. According to preliminary maritime communications and regional monitoring sources, the Iranian frigate transmitted a distress signal shortly after dawn while operating in waters close to South Asia.
The distress call reportedly reached maritime monitoring networks at 05:07 hours, indicating that the vessel was approximately 17–19 nautical miles off the coast of Galle in the Indian Ocean. The coordinates placed the Iranian warship uncomfortably close to heavily trafficked commercial sea lanes and not far from the strategic maritime approaches to Sri Lanka.
Within minutes, a regional search-and-rescue operation began to mobilise.
Units of the Sri Lankan Navy, supported by reconnaissance aircraft from the Sri Lankan Air Force, were dispatched toward the area as part of a precautionary monitoring operation. Sri Lankan maritime command sources confirm that surveillance flights and surface patrols were initiated to determine whether debris, survivors, or unexploded ordnance posed a threat to regional shipping routes.
But what initially appeared to be a routine maritime distress response soon evolved into something far more controversial.
Rumours of a Submarine Engagement
Over the past week, defence analysts and regional intelligence observers have begun circulating reports suggesting that the Iranian vessel may have been engaged by a submerged American submarine.
The alleged platform involved is the USS Minnesota, a nuclear-powered attack submarine belonging to the United States Navy.
The submarine, part of the Virginia-class fleet, is among the most advanced undersea combat platforms in the world. Equipped with sophisticated sonar arrays, stealth propulsion, and Mk-48 Advanced Capability torpedoes, the vessel is designed to conduct covert anti-ship and anti-submarine warfare across global oceans.
According to the circulating reports, the submarine allegedly fired two torpedoes at approximately 04:51 hours toward the Iranian frigate.
If these claims are accurate, the timeline suggests a seven-to-ten minute interval between the torpedo engagement and the distress call transmitted by the Iranian vessel.
More importantly, the reports claim that only one of the torpedoes struck the target.
The first torpedo reportedly failed to reach the vessel, either losing guidance lock or missing the intended strike path.
The second torpedo allegedly struck the hull of the IRIS Dena, causing the damage that triggered the distress call.
At present, none of these claims have been officially confirmed by either Tehran or Washington. Nevertheless, the emerging narrative has raised a series of urgent maritime safety and legal questions.
The Missing Torpedo Problem
The most pressing concern involves the fate of the first torpedo.
Modern heavyweight torpedoes such as the Mk-48 series are equipped with a self-destruction or self-neutralisation mechanism designed to prevent unexploded weapons from drifting indefinitely through busy sea lanes.
However, these systems do not always activate instantly.
In some cases, torpedoes that miss their target may continue travelling until fuel depletion before sinking to the seabed.
This possibility has prompted a troubling scenario now being debated by maritime security experts.
If the alleged torpedo failed to strike its target and continued travelling eastward, it could theoretically have crossed into waters closer to Sri Lanka.
Given the geography of the region, such a weapon might eventually have entered shallow coastal zones ranging between five and ten metres in depth.
These are precisely the types of waters used by local fishing fleets and coastal shipping.
Should an unexploded torpedo lie dormant on the seabed in such an environment, it would represent a significant hazard.
Strategic Geography of the Incident
The waters between India and Sri Lanka are among the busiest maritime corridors in the world.
Thousands of cargo vessels transit annually between the Persian Gulf, East Asia, and Europe through sea lanes that pass close to the island’s western and southern coasts.
Even a single unexploded naval weapon could pose serious risks to:
• fishing communities
• commercial shipping
• undersea infrastructure
• coastal tourism operations
It is for this reason that international maritime protocols typically require states involved in naval engagements to notify relevant authorities when unexploded ordnance may remain at sea.
The global body responsible for overseeing such maritime safety issues is the International Maritime Organization.
The organisation’s conventions emphasise notification, transparency, and navigational warnings whenever military activity could endanger civilian shipping.
Why Sri Lanka Wants Answers
Officials in Colombo have not formally confirmed the torpedo allegation. However, naval sources indicate that internal discussions are underway regarding the possibility of requesting clarification from Washington.
If a torpedo was indeed fired in waters close to South Asia, Sri Lanka would have legitimate grounds to ask several critical questions.
First:
Was a torpedo launched that failed to reach its target?
Second:
If so, where did the weapon ultimately terminate its run?
Third:
Did the self-destruction mechanism activate as designed?
Fourth:
Why were regional maritime authorities not notified immediately?
These questions are not merely academic.
A dormant torpedo resting on the seabed could remain dangerous long after the initial incident.
Naval explosive ordnance disposal experts note that even when a torpedo’s propulsion system shuts down, its warhead may remain intact.
Recovery operations in shallow waters are technically feasible, but they require precise knowledge of the weapon’s last known trajectory.
Without such information, search operations become far more complex.
The Role of Sri Lanka’s Armed Forces
Following the distress signal from the Iranian vessel, regional surveillance intensified.
Patrol ships from the Sri Lankan Navy reportedly conducted extended monitoring sweeps west of the island, while maritime patrol aircraft from the Sri Lankan Air Force flew reconnaissance sorties over nearby sea lanes.
Although these operations were initially described as routine monitoring, defence observers believe they may also have been assessing whether unexploded ordnance or debris posed a risk to shipping.
Sri Lanka’s military is no stranger to maritime explosive hazards.
Decades of naval warfare during the island’s civil conflict left numerous underwater explosives scattered across coastal areas.
As a result, the country maintains specialised naval units trained in underwater ordnance detection and neutralisation.
Should credible evidence emerge of a missing torpedo, those units could theoretically participate in recovery operations.
However, locating a modern torpedo without precise tracking data would be comparable to searching for a missile on the ocean floor.
Strategic Silence from Washington
One of the most puzzling aspects of the controversy is the apparent absence of official statements.
Neither the United States Navy nor the U.S. Department of Defense has publicly acknowledged any submarine engagement involving the Iranian vessel.
Such silence is not unusual in submarine warfare.
Undersea operations are among the most closely guarded secrets in modern military strategy.
Even when incidents occur, governments often refuse to confirm or deny submarine deployments.
Yet the proximity of the alleged incident to South Asian waters complicates the matter.
Regional governments may demand transparency if civilian maritime safety is potentially at risk.