Kyiv Tells Greece It Will Keep Hitting Russian Tankers in International Waters, Testing Maritime Rules
Ukrainian diplomats have privately told Greek officials that Kyiv will continue targeting Russian tankers in international waters, invoking the UN Charter’s self‑defense clause. The pledge puts shipowners, insurers and coastal states on notice that the war is reaching further into global sea lanes and legal gray zones.
Ukraine is signaling that Russian‑linked shipping will not be safe simply by sailing outside its territorial waters. In a series of in‑person meetings, Ukrainian diplomats told Greek officials that Kyiv intends to keep striking Russian tankers in international waters, citing its right to self‑defense under Article 51 of the UN Charter, according to people briefed on the talks.
The discussions, held in recent days and disclosed on 11 July, came as Ukraine publicly claimed a string of drone attacks on Russian tankers and auxiliary vessels in the Sea of Azov. While those operations took place in waters adjacent to occupied Ukrainian territory and Russian coasts, the message to Athens suggests Kyiv is prepared to pursue targets farther afield if it deems them part of Russia’s war‑sustaining infrastructure. The comments have not been publicly denied by Ukrainian officials, and they align with Kyiv’s broader strategy of treating Russia’s energy and logistics network as a legitimate military target.
For Greek shipowners and crews – a powerful constituency in a country that controls a large share of the global tanker fleet – the warning lands close to home. Greek‑linked operators have been prominent in the complex web of shipping that still moves Russian oil and products despite sanctions and price caps. Even if specific vessels are not immediately at risk, the idea that Ukraine may take kinetic action against tankers in international waters forces commercial actors to re‑evaluate routes, insurance coverage, and their tolerance for carrying Russian cargo.
More broadly, the declaration raises uncomfortable questions for maritime law and coastal states along busy tanker routes. The UN Charter allows self‑defense against armed attacks, but how far that right extends into global commons like the high seas is often contested. By stating that it will continue hitting what it defines as Russian military‑supporting tankers beyond its own waters, Ukraine is effectively arguing that a ship’s role in sustaining aggression can override the usual presumption of safety in international shipping lanes.
Strategically, the move is aimed squarely at one of Russia’s main economic lifelines: its ability to export oil and oil products despite Western sanctions. Moscow has relied heavily on a “shadow fleet” of older tankers, opaque ownership structures, and alternative insurers to keep barrels moving. Kyiv’s message to Greece, a key shipping and flagging hub, is that this workaround is now a battlefield issue, not just a regulatory one. If even a small fraction of that fleet is deterred, delayed, or damaged, the cost and complexity of keeping Russian exports flowing will increase.
The stakes are not just between Kyiv and Moscow. Any Ukrainian strike in international waters carries a risk of collateral damage, misidentification, or diplomatic friction with the coastal state nearest the incident. It could also prompt Russia to respond in kind, or to use the precedent to justify its own actions against commercial shipping it labels as helping Ukraine. In a world already unsettled by attacks on tankers in the Red Sea and drone explosions near major ports, another vector of risk is the last thing maritime insurers and energy buyers want to see.
The underlying insight is stark: when a war drags on and sanctions struggle to bite, the line between battlefield and global commerce erodes, and tankers become tools of strategy as much as steel and oil. That is the line Ukraine is now openly crossing in its diplomacy with a major shipping nation.
The clearest signals to watch now are whether Greece or other flag states issue advisories or restrictions on carrying Russian cargo, whether insurers adjust premiums for tankers operating near Ukrainian‑declared risk zones, and whether any subsequent strike on a Russian‑linked tanker occurs clearly outside territorial waters – a test case that would likely trigger intense legal and diplomatic fallout.
Sources
- OSINT