LONDON (AP) - British police said experts found no hazardous materials in their search of the property where self-exiled Russian tycoon Boris Berezovsky's body was found.

Mr Berezovsky, a 67-year-old, one-time Kremlin kingmaker who fled to Britain after a bitter falling out with Russian President Vladimir Putin, was found dead on Saturday at the property in Ascot, a town 40km west of London.

Police are treating his death as "unexplained". They said on Sunday that officers specially trained in chemical, biological and nuclear materials had given the scene the "all clear". They said the majority of the cordon around the property had now been lifted, and crime scene officers were carrying out a full and thorough investigation to determine the circumstances around Mr Berezovsky's death.