Boris Berezovsky: Russia remembers 'controversial figure'
24 March 2013 Last updated at 07:33 GMT
Police with expertise in environments contaminated with chemical, biological and nuclear material are searching the house of the late exiled Russian tycoon Boris Berezovsky.
The 67-year-old's body was found at the property in Berkshire on Saturday.
He was a wanted man in Russia, an opponent of President Vladamir Putin, and had survived numerous assassination attempts, including a bomb that decapitated his chauffeur.
The BBC's Steve Rosenberg said Moscow news outlets have been using colourful language to remember Mr Berezovsky, describing him as "an evil genius" and "the great schemer".