http://www.kommersant.com/p726539/r_527/Alexander_Litvinenko/http://www.guardian.co.uk/russia/article/0,,1961546,00.html Guardian: British intelligence sources increasingly suspect that Alexander Litvinenko, the former spy killed with a radioactive poison, was the victim of a plot involving "rogue elements" within the Russian state, the Guardian has learned.
While ruling out any official involvement by Vladimir Putin's government, investigators believe that only those with access to state nuclear laboratories could have mounted such a sophisticated plot.
Police were last night closing in on a group of men who entered the UK among a large crowd of Muscovite football fans. The group of five or more arrived shortly before Mr Litvinenko fell ill and attended the CSK Moscow match against Arsenal at the Emirates stadium on November 1. They flew back shortly afterwards. While describing them only as witnesses, police believe their presence could hold the key to the former spy's death. [...]
Explaining the increasing belief that Mr Litvinenko's death involved Russian state elements, one official said yesterday: "Only the state would have access to that material".
Officials now go so far as to say that the involvement of individuals within the FSB in the affair is "probable". But they insist that it is far from definite and the evidence is still circumstantial.
Intelligence sources do not rule out the possibility that the perpetrators were "rogue elements" either still in the FSB or former members of it.
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