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13 December 2012, 18:48 | Updated: 13 December 2012, 19:02
It has emerged the Russian state was involved in the murder of former spy Alexander Litvinenko in central London.
A legal review in Camden, ahead of an inquest, has also heard Russia refused to extradite a main suspect over his death to the UK for questioning.
The 43 year old, who had been employed by MI6 for a number of years, died in 2006 after was poisoned at the Millenium Hotel in Grosvenor Square in Mayfair in 2006.
The inquest next year will be held before High Court judge Sir Robert Owen, who has been appointed assistant deputy coroner.