21 January 2016, 18:47 GMT
MOSCOW (Sputnik) — Earlier this week, the British inquiry blamed Litvinenko’s death on Russian authorities but could not conclude that the polonium-210 used to poison the former agent had come from Russia.
The Russian Foreign Ministry criticized the inquiry as politicized and lacking transparency, and said it had an adverse effect on Moscow-London relations.
"It is very superficial, very unprofessional. There are no and there have never been real intentions to establish the truth," Peskov told Rossiya 1 TV channel.
Alexander Litvinenko fled from Russia to the United Kingdom in 2000. He died in 2006, three weeks after drinking tea with his former colleagues Dmitry Kovtun and Andrei Lugovoy in central London.
Following his death, the UK authorities claimed that Litvinenko's former colleagues had poisoned him with the radioactive isotope polonium-210. A public inquiry into Litvinenko's death was formally established by the UK government in July 2014.
Earlier, Lugovoy said that he had passed a polygraph test conducted by British experts, that proved he was not guilty of murdering Litvinenko.
