Alexander Litvinenko in  2006: Forensic tests  uncovered a trail of  polonium-210 –  which is used in Russia’s nuclear industry –  following the movements of Andrei Lugovoy and Dmitry Kovtun, allowing Robert Owen  to declare in his report that he was “sure” the two men administered the poison that killed Litvinenko. Photograph: PA

As Alexander Litvinenko lay dying in a London hospital in November 2006, neither he nor his doctors understood the nature of his illness. But the form(...)

Reporters and witnesses file into The Guildhall for a coroner's inquest into the death of Boris Berezovsky in Windsor, England. The Russian tycoon was found dead in his home in Ascot on March 23rd. Photograph: Getty

Russian oligarch Boris Berezovsky, who died in a mansion near London in unexplained circumstances last weekend, was found lying on the floor of(...)

A police officer stands guard yesterday  outside the home of Boris Berezovsky in Ascot, Berkshire. Photograph: Steve Parsons/PA Wire

A postmortem examination on Russia n oligarch Boris Berezovsky has found he was hanged, police said. The examination by a Home Offic(...)

Boris Berezovsky stands at the Highgate Cemetery graveside in London of Alexander Litvinenko, accompanied by  the former security service agent’s widow Marina, who has cast doubt on rumours of suicide related to the Russian oligarch’s death. Photograph: Stefan Rousseau/PA Wire

Russia n prosecutors say the death of exiled oligarch and Kremlin critic Boris Berezovsky will not stop them trying to reclaim property he alle(...)

A police cordon blocks the road that leads to Russian oligarch Boris Berezovsky's house, after he was found dead yesterday at his home near Ascot in Berkshire. Photograph: Olivia Harris/Reuters

There is currently no evidence to suggest anyone else was involved in the death of Russian oligarch Boris Berezovsky, police said today. (...)

Russian oligarch Boris Berezovsky pictured outside the High Court in London  in 2011. Photograph: Andrew Winning/Reuters

Russian oligarch Boris Berezovsky has been found dead at his home in Britain. The businessman, who last year lost a £3 billion (€3.8 bill(...)