The outcome of a public inquiry into the killing of former Russian spy, Alexander Litvinenko, are due to be released by a judge.
Mr Litvinenko died at the age of 43 in 2006, days after being poisoned with a radioactive substance, which was believed to have been put in his cup of tea.
BBC said that two Russian men, Andrei Lugovoi and Dmitry Kovtun, have denied killing him.
The judge, Sir Robert Owen, would decide whether to name any culprits and whether any elements in the Russian state were responsible.
The result may also focus on whether it was specific investigations into links between organised crime and the Kremlin which led to Mr Litvinenko’s killing.
Report also disclosed that there was personal animosity between Mr Litvinenko and the Russian President, Vladimir Putin.