Ravil Maganov,, chairman of the board of directors for the Russian oil and gas giant Lukoil, died Thursday after falling out of a window at a hospital in Moscow, Russian news agency Interfax reports, citing an anonymous source.
Maganov is the latest in a series of Russian oligarchs, many of whom were involved in Russia's energy sector, who have died under unexplained circumstances.
Before Maganov's death on Thursday, at least seven Russian oligarchs have met sudden unexplained — and sometimes violent — deaths this year, though suicide is officially suspected in the incidents, according to Deutsche Welle.
Two sources confirmed to Reuters Thursday that Maganov, 67, died after falling from a window at Moscow's Central Clinical Hospital.
Two people familiar with Maganov also told Reuters they believed it was highly unlikely he had committed suicide.
Lukoil, Russia's second biggest oil and gas company, said in a statement Thursday that Maganov "passed away following a severe illness."