Exiled Russian tycoon Boris Berezovsky has died at his home in Berkshire aged 67, Russia's state-run news agency Ria Novosti reported, citing Mr Berezovsky's son-in-law Yegor Shuppe.
Mr Shuppe reportedly wrote on his Facebook page today, "Boris Berezovsky is dead”.
There has been no official confirmation of the report.
How Boris Berezovsky died is still being investigated, although his Berkshire mansion has been declared safe by radiation experts.
Russian oligarch Boris Berezovsky has died at the age of 67.