UK defense lab: No ID yet for source of nerve agent

Britain’s defense laboratory acknowledged Tuesday it hasn’t tracked down the source of the nerve agent that poisoned a Russian ex-spy, a statement the Kremlin said proved that British accusations of Moscow’s involvement were baseless.

Scientists at the U.K’s Porton Down lab previously identified the poison as a Soviet-developed type of nerve agent known as Novichok. The British government has said the only plausible explanation was that it came from Russia and blamed Russia for the attack on the former double agent and his adult daughter.

Porton Down chief executive Gary Aitkenhead said Tuesday that scientists at the lab “have not verified the precise source, but we provided the scientific information to the government who have then used a number of other sources to piece together the conclusions that they have come to.”

Aitkenhead told Sky News the attack with a highly toxic chemical weapon was “probably only within the capabilities of a state actor.”

At the same time, the lab’s job is “to provide the scientific evidence that identifies what the particular nerve agent is … but it’s not our job to say where that was actually manufactured,” he said.

Russian President Vladimir Putin quickly pointed at Aitkenhead’s statement as evidence that British accusations of Russian involvement were unfounded. Moscow has fiercely denied being behind the March 4 attack.

“The speed at which the anti-Russian campaign was launched causes bewilderment,” Putin said from Turkey, where he met with President Recep Tayyip Erdogan.

Putin added that Russia will push for a thorough probe and expects the international chemical weapons watchdog to consider Russia’s input.

“We want a thorough investigation. We would like to take part in it and expect to receive all the relevant materials,” Putin said. He insisted the nerve agent that Britain said was used to attack former double agent Sergei Skripal and his daughter, Yulia, could have been produced by some 20 nations.

Putin spokesman Dmitry Peskov said Moscow expects an apology.

The poisonings of the Skripal in Salisbury, England has sparked a crisis in relations between Russia and the West, producing a wave of diplomatic expulsions unseen even at the height of the Cold War.

Britain, along with the United States and at least two dozen other U.K. allies wanting to show solidarity, have expelled over 150 Russian diplomats. Russia has ordered the same number of their envoys out.

The British government insisted that several pieces of information contributed to its conclusion that the Russian government was responsible for the nerve agent attack, including intelligence that Russia had produced Novichok within the last decade and had investigated ways of delivering nerve agents for assassinations.

Moscow has rejected those claims, saying that it never produced the agent dubbed Novichok in the West and completed the destruction of its Soviet-era chemical weapons stockpiles last year under international oversight.

Russian officials also have suggested the poison could have come from Britain, pointing out that Porton Down conducts secret chemical and biological weapons research.

Russian Deputy Foreign Minister Alexander Grushko called the poisonings a “provocation arranged by Britain” to justify high military spending because “they need a major enemy.”

Aitkenhead said there was “no way” the nerve agent could have come from the high-security facility.

“We deal with a number of very toxic substances as part of the work that we do. We’ve got the highest levels of security and controls,” he said.

Skripal, 66, a former Russian intelligence agent convicted of spying for Britain, remains in critical condition. British officials say his 33-year-old daughter’s health is improving.

At Russia’s request, the Organization for the Prohibition of Chemical Weapons plans to hold an emergency meeting on the case Wednesday at its headquarters in The Hague.

Yury Filatov, Russia’s ambassador to Ireland, said Russia wants Britain to “provide every possible element of evidence they might have in their hands” about the attack.

If Britain does not show evidence to back up its allegations that Moscow initiated the attack, “there are ample grounds to assume that we are dealing with a grand scale provocation organized in London aimed to discredit Russia.”

Britain’s Foreign Office said the Moscow-requested OPCW meeting was a “diversionary tactic, intended to undermine the work of the OPCW in reaching a conclusion” about the nerve agent attack.

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Isachenkov reported from Moscow. Raf Casert in Brussels and Nataliya Vasilyeva in Moscow contributed to this story.

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