Dmitry Kovtun, one of the two Russian men accused of assassinating the former spy and Kremlin critic Alexander Litvinenko in London, died of Covid in a Moscow hospital on Saturday. Litvinenko died in 2006, weeks after drinking tea laced with the radioactive isotope polonium 210 at a London hotel, where he met Kovtun and the other suspect, Andrei Lugovoi. The case has since weighed on relations between Britain and Russia. After Litvinenko’s death detectives found polonium in all the hotel rooms where Kovtun and Lugovoi had stayed in London, as well as on Lugovoi’s plane seat from Moscow and in numerous other locations including at Arsenal’s Emirates stadium. Kovtun’s death aged 56 was first reported by Lugovoi, a former KGB bodyguard who is now a Russian MP, who wrote on his Telegram page on Saturday: “This is an irreplaceable and difficult loss for us.” “Sad news came today, as a result of a serious illness associated with a coronavirus infection, my close and faithful friend suddenly died,” Lugovoi added. A British inquiry in 2016 concluded that the Litvinenko murder was an operation of Russia’s FSB spy agency and that the assassination was “probably” approved at the time by the Russian president, Vladimir Putin. One of the key findings presented by the British inquiry led by Sir Robert Owen were phone records that showed Kovtun made a phone call to another FSB colleague saying he was looking for a cook to put “a very expensive poison” in Litvinenko’s food or drink. Last year, the European court of human rights also ruled that Russia was responsible for the killing of Litvinenko, ordering Moscow to pay €100,000 (£85,000) in non-pecuniary damages to his widow, Marina. In a deathbed statement, Litvinenko accused Putin of being behind his killing. The Kremlin has always denied the charges and refused to extradite the two suspects to face trial. Before the fall of the Soviet Union, Kovtun is believed to have served in the communist east at the KGB’s ninth directorate, which was charged with the protection of top Kremlin officials. After the breakup of the Soviet Union, Kovtun and his then German wife, Inna Hohne, moved to Hamburg and claimed political asylum, with him working as a waiter. He eventually left Germany for Russia where he was involved in various businesses. In contrast to Lugovoi, who became a prominent politician following the poisoning of Litvinenko, Kovtun kept a low profile in Russia and not much is known about his private life. Hohne ​previously told German detectives during the inquiry into Litvinenko’s death that Kovtun was ​a heavy drinker who shifted between badly paid jobs and dreamed of being a porn star. Litvinenko, who was dismissed from the FSB after publicly criticising the security service’s connection to organised crime, is believed to have been killed over his work for the British intelligence agencies and his claims that the FSB was responsible for the bombing of apartment blocks in Moscow and two other cities in 1999. The Litvinenko killing was followed by a series of other poisonings of Kremlin critics that the west blamed on Russia, including the attempted poisoning of the former double agent Sergei Skripal in Britain in 2018 and the opposition leader Alexei Navalny in Siberia in 2020.