UK foreign secretary: Russia's been stockpiling nerve agent for last decade
CGTN
["china"]
UK possesses evidence that Russia has "not only been investigating the delivery of nerve agents for the purpose of assassination, but has also been creating and stockpiling Novichok" over the past decade, UK Foreign Secretary Boris Johnson told BBC's Andrew Marr Show on Sunday.
This comes one day before a visit by international chemical weapons experts. 
According to a Foreign Office statement, technical experts from the Organization for the Prohibition of Chemical Weapons (OPCW) will visit Britain on Monday to collect samples of the nerve agent used in the ex-spy poisoning attack. Results are expected to take a minimum of two weeks.
Former Russian double agent Sergei Skripal and his daughter Yulia are in a critical condition after being exposed to a nerve agent in the English city of Salisbury on March 4, leading Britain to expel 23 Kremlin diplomats.
(With inputs from agencies)