The chairman of Russia's Lukoil oil giant, Ravil Maganov, has died after falling from a hospital window in Moscow, reports say.
The company confirmed his death but said only that Maganov, 67, had "passed away following a severe illness".
Russian media said he was being treated at Moscow's Central Clinical Hospital and died of his injuries.
Maganov is the latest of a number of high-profile business executives to die in mysterious circumstances.
