A close associate of an outspoken critic of Russian leader Vladimir Putin has been found dead in his London home.
Nikolai Glushkov, 69, once worked for a company owned by Russian oligarch Boris Berezovsky. Berezovsky built a business empire valued in the billions before running afoul of the Kremlin and publicly denouncing Putin.
Glushkov's cause of death was not immediately known.
Glushkov also once testified in court against billionaire Roman Abramovich, a Putin ally who is also the owner of the Chelsea Football Club.
In the 1990s, Glushkov held a senior position with Russian airline Aeroflot.
Berezovsky was a close associate of Alexander Litvinenko, a former spy who was killed with a radioactive poison in London in 2006. A British inquiry concluded that Litvinenko's death was the work of the Russian state and had probably been authorized by Putin.
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