Russian Federation has said it does not have such nerve agents and President Vladimir Putin said it was nonsense to think that Moscow would have poisoned the Skripals. "United Kingdom released additional information today supporting United Kingdom conclusions that highly likely Russian Federation was responsible", the embassy said.
Britain blamed Russian Federation for the poisoning and Prime Minister Theresa May said that the Skripals had been attacked with a military-grade nerve agent from the Novichok group of poisons, developed by the Soviet Union in the 1970s and 80s. He said the codeword for the chemical weapons programme, which included Novichok, was "FOLIANT".
Kono said he's gravely concerned about the use of chemical weapons, and that people who use them must be punished severely. "Within the last decade, Russian Federation has produced and stockpiled small quantities of Novichoks under the same programme".
Cyber specialists from the GRU - Moscow's Main Intelligence Directorate - targeted email accounts belonging to Miss Skripal as long ago as 2013, and possibly even before that, according to newly-declassified British intelligence.
The letter continues: "By 1993, when Russia signed the Chemical Weapons Convention, it is likely that some Novichoks had passed acceptance testing, allowing their use by the Russian military. About 20 countries could have developed this chemical material - why have they pointed at Russian Federation?" Samples taken from the home found a high concentration of the nerve agent - believed to be Soviet-produced novichock - on the door handles.
Novichok is thought to have been developed to prevent detection and to circumvent worldwide chemical weapons controls. "There can be no doubt what was used and there remains no alternative explanation about who was responsible - only Russian Federation has the means, motive and record", Johnson said. "There is no plausible alternative explanation", added Sir Mark.
Britain said Thursday that an worldwide chemical weapons monitoring organization's report strongly bolsters the case for Kremlin guilt in last month's poisoning of onetime spy Sergei Skripal, 66, and his daughter, Yulia, 33. Her father remains in the hospital but British health officials say he is improving.
The incident has drawn comparisons to the 2006 death of former KGB agent Alexander Litvinenko after drinking radioactive tea.