His daughter, who lives in Moscow, was visiting him when the two were poisoned in an attack that has triggered an global diplomatic crisis between Russia and the West. Sedwill's letter to NATO Secretary General Jens Stoltenberg alleged that Russia had "the technical means, operational experience and motive for the attack on the Skripals and that it is highly likely that the Russian state was responsible".
Mr Yakovenko said: "We still don't have any information about the investigation, we don't have official replies from the British government".
OPCW analysts, based in The Hague, took blood samples from the Skripals as they were treated in Salisbury Hospital after the March 4 poisoning.
The worldwide chemical weapons watchdog has said an analysis of samples gathered from Sergei Skripal, Yulia Skripal and detective sergeant Nick Bailey - the officer affected during the emergency response - confirmed the U.K.'s assessment of the incident.
Poisoning of the Skripals: Ex-double-agent Skripal and his daughter were found slumped over in public in Salisbury after apparently being poisoned.
The government of Prime Minister Theresa May expelled 23 Russian diplomats in retaliation and called on ir worldwide allies to follow in ir footsteps.
Russian Federation denies the British claims about Novichok, saying that it completed the destruction of all its Soviet-era chemical weapons arsenals previous year under worldwide oversight.
Russian Federation has denied possessing the nerve agent used, while President Vladimir Putin has said it was nonsense to think Moscow would have poisoned Skripal and his daughter.
The OPCW did not publically name the chemical, though it said it had identified it and its chemical structure in its secret report.
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Ramirez added an RBI double and scored on shortstop Manny Machando's throwing error - his second of the game. Marcus Walden gave up one run on three hits over three innings, good enough for his first big-league save.
The BBC's diplomatic correspondent James Landale said: "This is understood to strengthen the argument that this substance came from Russian Federation because it is more likely to have been created by a state actor with the capability to make the nerve agent".
And it was "highly likely that the Russian intelligence services view at least some of its defectors as legitimate targets for assassination", he said.
At the same time, Russian Federation stepped up demands for diplomatic access to Skripal, who remains hospitalized, and his daughter, who is continuing her recovery in an undisclosed location after having been released from a hospital.
Mark Sedwill said in a letter to NATO Secretary General Jens Stoltenberg on Friday that email accounts of Yulia had been targeted in 2013 by cyber specialists from Russia's GRU military intelligence service.
In his letter, Sir Mark set out why the Government believes that only Russian Federation has the "technical means, operational experience and the motive" to carry out such an attack.
"There is no plausible alternative explanation".
Moscow has strongly denied responsibility and says Britain is waging a defamation campaign against it. "So far, we doubt it much", an embassy statement said.
"This is a fact of life". "We didn't produce Novichok, we didn't store this Novichok, so-called under the Western classification", he said.
"Russia's chemical weapons programme continued after the collapse of the Soviet Union". Earlier this week Miss Skripal, 33, snubbed the Kremlin and turned down Russian offers of help. Yulia has been discharged and is reportedly being kept at an MI5 "safe house".