A friend of murdered former Russian spy Alexander Litvinenko has broken his silence, saying he would be happy to speak to the authorities about the killing.
Boris Berezovsky told the BBC's Newsnight programme on Monday night that, on his deathbed, Mr Litvinenko had said former KGB agent Andrei Lugovoi was responsible for his poisoning.
Mr Berezovsky said Mr Litvinenko had told him: "I think Lugovoi is involved in my poison."
He added: "Scotland Yard must question me about my knowledge of Alexander.
"But Scotland Yard has never asked me to answer to the Russian prosecutor office.
"And moreover, me personally, I initiated this idea for Scotland Yard people and told them I am absolutely open to meet people from Russia if it helps to investigate Alexander's case."
Mr Litvinenko, 43, was apparently poisoned with the radioactive substance Polonium-210 while in London last year. He died later in hospital.
