UK scientists at the Porton Down defence research laboratory analysing the nerve agent used in an attack in Salisbury are yet to positively ID the source country of the chemical weapon.
Russia was fingered in the nerve agent attack used to poison former Russian spy Sergei Skripal, 66 and his daughter Yulia Skripal, 33.
The chemical weapon known as novichok is a military-grade nerve agent said to have been produced only by the Russians during the Cold War era. The Russians have vehemently denied their involvement in the attack that has snowballed into a diplomatic row leading to the expelling of Russian diplomats across Europe and the United States.
It has not yet been established if the Russians administered the nerve agent as Gary Aitkenhead, the chief executive of the British Defence Science and Technology Laboratory (DSTL), said the poison had been identified as a military-grade nerve agent but that the source country is yet to be established.
“We have not identified the precise source, but we have provided the scientific info to government who have then used a number of other sources to piece together the conclusions you have come to,” He said.