24/03/2013 10:14 GMT | Updated 25/03/2013 07:53 GMT

Boris Berezovsky: A Life In Pictures Of The Russian Oligarch

The death of Boris Berezovsky is yet another turn in the extraordinary story of a man who went from a poorly paid Soviet mathematics professor to a multi-billionaire oligarch in just over a decade.

Rumours abound Berezovsky committed suicide but in the shadowy world of Russian politics and KGB skullduggery authorities are taking no chances.

Specialist officers in chemical, biological, radiological and nuclear substances searched his mansion over the weekend looking for clues to the as-yet unexplained death.

Photo gallery Boris Berezovsky: A Life In Pictures See Gallery