A joint investigative team traced FSB operatives across dozens of overlapping flights with their target — and the Kremlin’s answer was to call the world’s most detailed poisoning investigation ever published “insulting.”
In August 2020, Russian opposition leader Alexei Navalny collapsed on a domestic flight after being poisoned with a Novichok-class nerve agent — the same category of chemical weapon Russian military intelligence used against Sergei Skripal in Salisbury two years earlier. What followed was one of the most granular open-source investigations ever conducted into a state assassination attempt: a joint inquiry by Bellingcat, the Insider, Der Spiegel, and CNN used leaked telecom and flight records to identify a clandestine FSB unit that had shadowed Navalny on more than thirty overlapping flights across Russia since 2017, and to name the specific operatives present in Tomsk when he was poisoned. Confronted with names, phone numbers, and travel itineraries rather than circumstantial claims, the Kremlin did not produce a counter-investigation. It denied the poisoning occurred at all, accused Navalny of working for the CIA, and called the reporting “insulting” — a rhetorical strategy that substitutes moral outrage for evidence, a recurring feature of Russian state responses when caught rather than merely accused.
A Poisoning Mid-Flight
On August 20, 2020, Navalny fell violently ill aboard a domestic flight from Tomsk to Moscow. The pilot made an emergency landing in Omsk, and Navalny was evacuated to Berlin’s Charité hospital two days later after a public campaign by his family and allies to secure his transfer. German military laboratories, later corroborated by labs in France and Sweden and by the Organisation for the Prohibition of Chemical Weapons, confirmed he had been poisoned with a Novichok-class nerve agent.
Tracing the Poison Squad
Rather than rely on circumstantial timing, investigators went after the paper trail. In December 2020, Bellingcat and its partners published a joint investigation that used leaked telecom metadata and commercial flight records to show operatives from a clandestine FSB unit specializing in chemical weapons had shadowed Navalny on more than thirty overlapping flights to the same destinations since 2017. The investigation’s methodology identified three operatives — two of them trained medical doctors — who traveled to Tomsk alongside Navalny in August 2020, using cover identities that unraveled once cross-referenced against leaked passport and flight databases. Weeks later, in a recorded phone call, Navalny successfully posed as a Russian security official and got one of the named FSB operatives to describe, in detail, how the poison had been applied to Navalny’s underwear — a call that supplied a rare direct admission and became one of the most widely viewed pieces of open-source evidence produced during the investigation.
A Pattern, Not an Isolated Case
Follow-up reporting extended the scope of the same unit’s activity. In January 2021, Bellingcat found the same poison squad had been linked to the deaths of three other Russian activists in years prior, and a subsequent investigation tied the unit to surveillance of writer and Navalny ally Dmitry Bykov. The Global Investigative Journalism Network’s account of how the reporting team worked noted the operation relied almost entirely on commercially available leaked data sets — hardly clandestine sourcing — which made the Kremlin’s later claim that the findings were fabricated especially difficult to sustain credibly.
The Kremlin’s Response
Confronted with named operatives rather than allegations, Russian officials did not attempt to rebut the specific evidence. Kremlin spokesman Dmitry Peskov called the assertions in Navalny’s own account of events “extremely offensive and also unacceptable,” and — in a pattern familiar from the Skripal case — pivoted to claiming Navalny was working with Western intelligence services, telling reporters that “specialists from the U.S. CIA are working with him right now,” according to reporting from the Moscow Times. Russian officials separately maintained that no trace of a nerve agent had been found while Navalny was on Russian soil, implying — without evidence — that the poisoning must have happened after he left the country, even though he fell violently ill mid-flight over Russian territory.
Scale, Reach, and Outcome
The joint investigation was covered globally and cited directly in the European Union’s sanctions decisions against senior FSB officials, imposed within weeks of publication. The OPCW’s independent laboratory confirmation in October 2020, based on biomedical samples supplied by Germany, mattered beyond the diplomatic dispute between Berlin and Moscow: it moved the case into the framework of international chemical weapons law, giving the EU an evidentiary basis to sanction individuals under its Novichok-related regime independent of any single government’s bilateral findings. Navalny returned to Russia in January 2021 despite the findings, was arrested on arrival, and died in an Arctic penal colony in February 2024 — a death Western governments, including the United States and European Union, said Putin bore ultimate responsibility for, without a formal finding on immediate cause. The case remains one of the clearest instances in which open-source investigators, using nothing but leaked commercial data, outpaced formal state intelligence assessments in publicly naming individual operatives behind a state assassination attempt, leaving the Kremlin with denial as its only available response.
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