There is currently no evidence to suggest anyone else was involved in the death of Russian oligarch Boris Berezovsky, British police said Sunday, dpa reported.
The 67-year-old businessman was found dead at his home in Berkshire, England, on Saturday by a bodyguard, and specialist officers in chemical, biological, radiological and nuclear substances examined the property Sunday before giving the all clear.
Police detective Kevin Brown of Thames Valley Police said: "It would be wrong to speculate on the cause of death until the post mortem has been carried out. We do not have any evidence at this stage to suggest third party involvement."
Berezovsky, who last year was ordered to pay 35 million pounds (56 million dollars) in legal costs in a case against rival Roman Abramovich, was reportedly found dead in his bathroom after taking his own life.
On leaving the property, the paramedics who declared him dead at the scene had their radiation detector triggered, prompting chemical, biological, radiological and nuclear experts to examine Berezovsky's country home, police said.
But Sunday morning they confirmed the home was safe to work in.