Fugitive Russian tycoon Boris Berezovsky has died in London at the age of 67.
The report emerged in the Facebook account of his son-in-law Yegor Shuppe.
The report is yet to be confirmed. Details are forthcoming.
He was born 1946, lived in Great Britain from 2000.
Berezovsky made his fortune in Russia in the 1990s when the country went through privatisation of state property. He profited from gaining control over various assets, including the country's main television channel, Channel One. In 1997 Forbes magazine estimated Berezovsky's wealth at US$3 billion.
He was at the height of his power in the later years of Boris Yeltsin presidency, when he was deputy secretary of Russia's security council.
Following the Russian presidential election in March 2000, Berezovsky went into opposition and resigned from the Duma. After he moved to Britain, the government took over his television assets, and he divested from other Russian holdings.
In 2012 Berezovsky lost a High Court case he brought against Roman Abramovich in London over the ownership of Sibneft, where he sought over £3 billion in damages.