By Li Hongmei

A post-mortem examination found that self-exiled Russian tycoon Boris Berezovsky died by hanging, and there was nothing pointing to a violent struggle, British police said.

Thames Valley Police said Monday that further tests, including toxicology examinations, will be carried out. The force did not specify whether the 67-year-old businessman hanged himself.

Once one of Russia's richest men, Berezovsky fled to Britain in 2001 and had since become a vocal critic of the Kremlin.

Berezovsky's body was found by an employee on the bathroom floor at his upscale England home on Saturday. The employee called an ambulance after he forced open the bathroom door, which was locked from the inside.

Police said the employee was the only person in the house when Berezovsky's body was discovered. They have said there was no evidence to suggest anyone else was involved in the death.

A forensic examination of Berezovsky's home will continue for several days, police said Monday.

A mathematician-turned-Mercedes dealer, Berezovsky built up his wealth during Russia's privatization of state assets in the 1990s following the breakup of the Soviet Union. He gained political clout and opportunities to buy state assets like oil and gas at knockdown prices.

The tycoon had been charged with fraud and embezzlement before fleeing Russia.