LONDON, March 25 - RAPSI. Boris Berezovsky's bodyguard called for an ambulance after finding him lying on the bathroom floor of the oligarch's Berkshire home on Saturday afternoon. The bodyguard was the only other person in the house and he said he had not seen his boss since Friday evening, Thames Valley police said.

The police said that the bodyguard, who had not seen Berezovsky since 10.30 p.m. Friday, 11 hours previously, forced open the bathroom door, which was locked from the inside, and found the 67-year-old lying dead on the floor. The ambulance staff said he died around 3.30 p.m. (7.30 p.m. MSK) on Saturday.

When Berezovsky's relatives arrived, the police were already at the site.

Police officers trained in handling chemical, biological and radioactive material were summoned to the house after a paramedic's personal electronic dosimeter was triggered. However, they did not find any traces of radiation at the house.

Thames Valley police said they were now "building a picture of the last days of Mr. Berezovsky's life, speaking to close friends and family to gain a better understanding of his state of mind."

Berezovsky was well known for his criticism of Russian President Vladimir Putin and there was some speculation that he may have been murdered. Some of his friends, however, believe he was suffering from severe depression after the recent court ruling against him in his $5.5 billion lawsuit with Roman Abramovich, and that he may have committed suicide.