The former FSB officer Alexander Litvinenko was assassinated in London in 2006 with polonium-210, in an operation carried out by Russian agents and probably approved at the top of the Russian state

The case that it was a Russian state operation

The attribution to the Russian state is not a hunch attached to a mysterious death. It is a convergence of physical evidence, motive, and formal findings, each element serious and the whole more so.

Start with the weapon. Polonium-210 is not a poison of opportunity. It is produced in nuclear reactors and is extraordinarily hard for any private person to acquire in a lethal quantity, which on its own tilts the field of suspects sharply toward an actor with access to nuclear materials. The Owen Inquiry drew precisely this inference, noting that Lugovoi and Kovtun were highly unlikely to have obtained the isotope on their own.

Add the forensic trail. The radioactive contamination mapped across London, and onto the planes the two men used, tied their movements to the poison with a concreteness that assassination cases rarely offer, and the strongest readings pointed back to the teapot at the Pine Bar. Then the motive: Litvinenko had spent years publicly accusing the FSB and Putin personally of grave crimes, giving the Russian state an obvious reason to want him silenced.

Finally, and decisively, the official findings. In January 2016 the statutory inquiry chaired by Sir Robert Owen, able to weigh secret intelligence in closed session, concluded that Lugovoi and Kovtun had poisoned Litvinenko, that they were probably acting for the FSB, and that the operation had probably been approved by FSB director Nikolai Patrushev and by President Putin. In 2021 the European Court of Human Rights went further on the state question, finding it established beyond reasonable doubt that the two men killed Litvinenko as agents of Russia, and holding Russia responsible.

A reactor-made poison, a radioactive trail across London, a clear motive, a public inquiry, and a European court all point the same way. This is why the state-assassination account is mainstream history, not a fringe theory.

That is the case at full strength: not a criminal conviction, which Russia's refusal to extradite has made impossible, but a body of physical evidence and formal adjudication coherent enough that investigators, a senior judge, and an international court have all landed in the same place.

The honest limits

Substantiated is not the same as proven beyond every argument, and a fair account has to name what remains open, because the limits are real even though they do not overturn the conclusion.

The largest is that no one has been convicted. Andrei Lugovoi and Dmitry Kovtun are in Russia, which refuses to extradite its citizens, so the case against them has never been tested at a criminal trial, and both men deny any involvement. The attribution rests on an inquiry and a human-rights court rather than on a jury's verdict. That reflects Russia's protection of the suspects rather than a hole in the evidence, but it is a genuine difference from a case that ends in a conviction, and it should be stated plainly.

There is also the matter of closed evidence. The Owen Inquiry's striking conclusion that the operation was “probably approved” by Patrushev and by Putin drew in part on secret intelligence heard in closed session, which neither the public nor the accused can examine. Owen framed the finding as a reasoned probability rather than as documentary proof, and honest readers can weigh a probability judgment built partly on unseen material differently from one built entirely in the open.

And the operational detail is reconstructed rather than confessed. The evidence points to more than one attempt to poison Litvinenko across October and November 2006, pieced together from contamination patterns and testimony, so parts of exactly how and when the polonium was administered are inferred. None of this dissolves the case. It marks the edges of what can be said with certainty, and those edges sit well outside the central, twice-adjudicated finding that Russia was responsible.

The named men, stated carefully

One strand calls for particular care, because it is where documented findings meet the denials of specific, living people. Investigators, the inquiry, and the European Court all identified two men as the hands that carried out the killing.

Andrei Lugovoi, a former KGB and FSB officer who later became a member of the Russian parliament, and Dmitry Kovtun were found by the Owen Inquiry to have placed polonium-210 in the tea Litvinenko drank, and the ECHR found it established beyond reasonable doubt that the pair carried out the assassination. The Crown Prosecution Service concluded there was enough evidence to charge Lugovoi with murder and sought his extradition. Yet both men have consistently denied any part in the killing, Russia has refused to hand either over, and no criminal court has convicted them. Kovtun died in 2022.

So the accurate way to hold this is that the attribution to the two men is the finding of a public inquiry and an international court, reached to their respective standards, and it is strong. It is not a criminal conviction, and the men reject it. Reporting what an inquiry and a court concluded is not the same as this site independently pronouncing individual guilt, and keeping those apart is not a technicality: it is the difference between relaying an adjudicated record and making a fresh accusation of our own.

The inquiry and the court named the men; the men deny it and Russia shields them. Reporting that finding is not the same as this site passing its own verdict on their guilt.

Why it became a defining case

Of the many contested deaths of the era, the Litvinenko poisoning is among the most remembered, and it endures for reasons partly separate from the strength of the evidence.

It endures because the method is extraordinary. A man killed slowly and publicly by a radioactive isotope slipped into a pot of tea in a Mayfair hotel reads like invented fiction, and the sheer strangeness of polonium-210 as a murder weapon fixes the story in memory more firmly than an ordinary killing ever could. The three weeks of visible decline, photographed and reported, gave the case a human face that lingered.

It endures because, unusually, the record backs it. Most notorious deaths spawn rival theories that never resolve; this one produced a radioactive evidence trail, a statutory public inquiry, and a judgment of the European Court of Human Rights, all pulling the same way. The satisfaction of a mystery whose obvious suspect turns out to be the officially found one is rare, and it gives the case a durability flimsier stories never earn.

And it endures because it came to stand for something. The killing, and the later Novichok attack on Sergei Skripal in Salisbury in 2018, came to symbolize the willingness of the Russian state to reach across borders after those it regarded as traitors, and Litvinenko, a defector poisoned in the capital of his adopted country, became a byword for that long reach. A story that carries that weight is remembered not only for what happened in the Pine Bar but for what it represents.