Thames Valley Police and the South East Counter Terrorism Unit have issued a statement following the "open" verdict into the death of Russian Boris Berezovsky. He was found dead at his ex-wife's mansion in Ascot last year.
It said the two organisations had "carried out a thorough investigation into the unexplained death of Platon Elenin formerly known as Boris Berezovsky."
An inquest into the death of a Russian tycoon has heard evidence - from the bodyguard - who found him dead at his home in Ascot - a year ago.
Boris Berezovsky, who'd been a fierce critic of Vladimir Putin, had lost a 3 billion pound court case against Chelsea Football Club owner, Roman Abromovich.
Our reporter, Cary Johnston, has been following the inquest at Windsor Guildhall for us today.
The Russian oligarch Boris Berezovsky, found dead at his Berkshire home, became a "broken man" and spoke of killing himself after losing a multibillion-pound legal battle with Chelsea Football Club owner Roman Abramovich, his inquest has heard.
His body was discovered slumped on the floor by his bodyguard at his ex-wife's luxury home in Ascot last March.
His death came months after his case involving billionaire Mr Abramovich ended in defeat - costing him millions of pounds and altering his personality, the hearing was told.
Boris Berezovsky talked regularly about suicide and described himself as "the poorest man in the world" before his death, an inquest has heard.
Mr Berezovsky's body guard added, however, that security was "very light" at the Berkshire home where the oligarch was found dead.
Boris Berezovsky was unprotected by security for "a couple of hours" prior to his death, an inquest into the Russian oligarch's death has heard.
ITV News' Romilly Weeks reports:
Russian tycoon Boris Berezovsky was a "broken man" after losing a lengthy court case against Chelsea owner Roman Abramovich, an inquest has heard.
The loss in the £3 billion claim is thought to have cost Mr Berezovsky £70 million in total.
Boris Berezovsky's family has been asked why 'potentially significant' information was only presented to a coroner two days before his inquest was set to resume.
ITV News' Romilly Weeks reports from Windsor Guildhall:
The inquest into Mr Berezovsky's death was opened and quickly adjourned shortly after his death in March last year.
The inquest into the death of Boris Berezovsky has been opened and adjourned. There was a brief account of the circumstances around the discovery of the body.
He was found with material around his neck and also a piece of similar material tied around a shower nearby. There is no evidence of third party involvement. However, investigations are still ongoing, so this possibility cannot be eliminated.
Police are still waiting for toxicology reports and the house where he lived in Ascot remains 'under police control' as searches continue.
Berezovsky's body was formally identified this week by his eldest daughter.
An inquest is due to open into the death of Russian billionaire Boris Berezovsky. He was found dead at his home in Ascot on Saturday.
The family of Boris Berezovsky’s second wife Galina Besharova have released a tribute to him through Thames Valley Police.
Mr Berezovsky had two children from this marriage, a son and a daughter.
The tribute, which is written by Mr Berezovsky’s daughter Anastasia on behalf of the family, reads: “My father was not the typical parent, nothing about him was ordinary. He has coloured my life in infinite ways, and I know that what he concerned himself most with was making all his children proud.
“His determination and excitement for every aspect of life is something that stands out in even my earliest memories of him and that will always remain deep in my heart.
“There aren't enough words in any language that can somehow express everything that he was and everything he will continue to be. The only word that comes close is extraordinary.”