Skripal, 66, and Yulia, 33, were poisoned on March 4 after being exposed to a nerve agent in Salisbury, England.
The Turkish president also said that Turkey and Russian Federation share common concerns regarding the Syrian crisis and have agreed that terror groups such as YPG and Daesh have no future in the country.
He said: "It is our job to provide the scientific evidence of what this particular nerve agent is, we identified that it is from this particular family and that it is a military grade, but it is not our job to say where it was manufactured".
He argued that Moscow had no reason to attack Mr Skripal, a former MI6 double-agent released in a 2010 spy swap.
Armin Laschet, a conservative ally of German Chancellor Angela Merkel, said the comment raised questions about Britain's drive to persuade allies to expell Russian diplomats.
The UK government has long pointed fingers at Russian Federation for the attack against the former double agent and his daughter on British soil.
Gary Aitkenhead, chief executive of the Porton Down defence laboratory, told Britain's Sky News that analysts had identified the substance as military-grade Novichok, the word used for a category of nerve agents developed in Soviet times.
"It is our assessment that Russian Federation was responsible for this brazen and reckless act and, as the worldwide community agrees, there is no other plausible explanation", the spokesperson said. "Now this has been confirmed by the head of the secret lab", the Russian Embassy in the United Kingdom said in a statement Tuesday. He added that challenges posed by Russian Federation "will last for years".
"As for the other countries, everything will also be symmetrical in terms of the number of people from their diplomatic missions who will be leaving Russian Federation, and for now that's pretty much it", said Foreign Minister Sergei Lavrov.
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Britain has called it "highly likely" that Russian Federation was responsible for the attack using a nerve agent developed in the USSR.
"We understood from the very start that UK Government statements on the nerve agent having been produced in Russian Federation were a bluff".
The official told The Associated Press that France would not respond to Russian Federation until Moscow answers questions posed by Britain's government on March 12.
Mr Aitkenhead said he had been advising those treating the Skripals.
"We hope that during those discussions a full stop will be placed on [the issue of] what happened" to former spy Sergei Skripal, Mr Putin said in Ankara ahead of the meeting on Wednesday of the Organisation for the Prohibition of Chemical Weapons (OPCW).
Mr Buzhinskiy added: "All the actions, the pressure from the U.S. and the West".
Police did not say how the nerve agent was delivered. Moscow vehemently denies its responsibility.
So far 29 nations have expelled diplomats over the poisoning, which the British government holds Russian Federation responsible for. Deputy Foreign Minister Alexander Grushko called Skripal's poisoning a "provocation arranged by Britain" in order to justify high military spending, because "they need a major enemy".