Moscow is interested in an honest and unbiased court hearing into the circumstances surrounding the death of Russian citizen Alexander Litvinenko in London.
Russia wants the trial under way in London to have access to any information capable of shedding light on this incident one way or another, Russian Foreign Minister Sergei Lavrov told the BBC television station.
Lavrov said he did not think that restricting access to this information would meet anyone's interests.
Russia wants the truth to be established in this case as much as other countries, and it thinks that Litvinenko's widow deserves deeper clarity as to what happened, the minister said.
The trial in this case should be free from irregularities and ought to respect the results of the investigation conducted in the UK, Lavrov said.
The Russian Prosecutor General's Office earlier offered its assistance to UK investigators, but London did not support this proposal, the minister said, adding that Moscow respects this decision.
Former Federal Security Service officer Litvinenko, who fled to the UK in 2000, died in November 2006 soon after meeting his former colleagues Andrei Lugovoi and Dmitry Kovtun. Traces of the radioactive element polonium 210 were found in Litvinenko's body, however an official medical report on the cause of Litvinenko's death has not been released yet.