RT has got new information the Federal Agency for press and mass media is gathering all the publications worldwide as to the Litvinenko case to be studied for libel and offensive comments against Russia which if found will then be followed

As for the investigation itself, Moscow denies that radioactive material that killed Alexander Litvinenko could have come from Russia.

Polonium-210 could have been put either in a drink or a cigarette. The police will have to test around 250 guests who were in the bar on that day.

Previously police said Aleksandr Litvinenko had been poisoned in the sushi bar where he met his Italian contact Mario Scaramella on November 1.

Yulia Svetlichnaya and James Heartfield, two academics from the University of Westminster who were the last to interview Aleksander Lltvinenko for their research, gave a press-conference in London.

The academics said Litvinenko was going to blackmail a powerful Russian Oligarch and a number of other people over corruption claims.

Ms Svetlichnaya and Mr Heartfield added they had the impression that Litvinenko was interested in making money.

Meanwhile, Russian police officers may soon be on their way to Britain after the General Prosecutor's Office launched their own criminal inquiry into the death of Mr Litvinenko.

Officials in Moscow said Russian officers would expect full co-operation from their Scotland Yard counterparts.