Thames Valley Police said they have launched an investigation into the "unexplained" death of a 67-year-old man at a property in Ascot, Berkshire.
His death is currently being treated as unexplained and a full inquiry is under way.
The area around the property has been cordoned off to allow the investigation to take place.
The inquiry is at a very early stage and more details will be released when available.
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.