The European Court of Human Rights on Tuesday ruled that Russia is responsible for the 2006 assassination of former KGB officer Alexander Litvinenko, who died after being poisoned by a radioactive substance, Reuters reported.

Litvinenko, critic and defector from the Kremlin, died three weeks after his green tea was poisoned in London with the rare radioactive substance polonium-210.

The former KGB agent reportedly told authorities while on his deathbed that he believed the Russian president Vladimir PoutineVladimir Vladimirovich Party PutinPutin Wins Large Majority in Russian Legislative Elections Vladimir Putin’s Party Should Keep Control of Lower House Amid Indictment Fraud Complaints Lawyer Clinton Reveals’ Bag of Tricks of the PLUS ordered the murder, and a 2016 UK investigation concluded that Putin likely ordered the attack.

Moscow and those accused of committing the assassination have denied their involvement in Litvinenko’s murder.

The 2016 investigation revealed that former KGB bodyguard Andrei Lugovoy and fellow Russian Dmitry Kovtun poisoned Litvinenko, presumably under the leadership of the Russian Federal Security Service (FSB).

The European Court approved these findings, declaring “beyond a reasonable doubt that the assassination was committed by Mr. Lugovoy and Mr. Kovtun”.

“The planned and complex operation involving the purchase of a rare deadly poison, the travel arrangements for the couple and the repeated and sustained attempts to administer the poison indicated that Mr. Litvinenko had been the target of the operation. “, did he declare.

The Kremlin quickly denounced the findings, with spokesman Dmitry Peskov calling the decision “extremely silly and damaging to the reputation of the European Court of Human Rights,” according to Reuters.

“The ECHR has little authority or the technological capacity to possess information on the matter,” he said. “There are still no results from this investigation and making such claims is unfounded to say the least.”

Earlier on Tuesday, UK authorities announced progress in yet another Russian poisoning case – claiming they have sufficient evidence to indict a third suspected Russian spy for the attempted assassination of another Russian defector turned British spy and his daughter.

Arrest warrants have been issued by the British authorities who have also filed requests for an Interpol opinion for the three suspected agents of the Russian Military Intelligence Service (GRU). Russia does not allow the extradition of its citizens.

Moscow has denied the allegations and Russian President Vladimir Putin said the men were civilians, according to the Associated Press.