Russian Foreign Minister Sergei Lavrov stated that in a conversation with Russian President Vladimir Putin, France's President Emmanuel Macron refused to reveal what France says is "irrefutable evidence" of Damascus' involvement in an alleged chemical incident in Ghouta.
Later on Friday morning, the Russian military clarified that the foreign power Moscow suspects of staging the attack is the United Kingdom.
Speaking to reporters in Moscow, Lavrov reiterated a strong warning to the West against military action in Syria, saying any such "adventures" in Syria would increase flows of refugees into Europe.
"I hope no one will dare take such a reckless step".
Syria has been engaged in a brutal civil war since 2011, with dictator Bashar al-Assad accused of several war crimes - including the use of illegal chemical weapons against civilians.
His comments come after President Donald Trump called last Saturday's attack in Douma "heinous" and "atrocious" and said his administration was weighing "major decisions" on how to respond.
Lavrov said Russian Federation expects OPCW team to quickly visit the site.
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"God forbid anyone takes the plunge in Syria", he said. He noted that Russian Federation had followed this situation, and the Syrian government was ready to issue visas immediately on the border without any additional formalities.
However, the Observatory says the facilities were evacuated by the Syrian government days before.
The Russians accused the White Helmets and "other pseudo-humanitarian organizations headquartered in the United Kingdom and U.S." of working "hand in glove with terrorists" to provoke military action against Syrian dictator Bashar Assad.
In a reference to the USA, he said that it "it would only benefit those who are protected by the ocean and expect to sit there and engage in continuous efforts to stir up the region in order to advance their geopolitical goals".
Russian Federation and the United States are using their channels of communications on Syria, according to the minister.
Lavrov noted that Russian and USA militaries have a hotline to prevent incidents, adding that it's not clear if it would be sufficient amid mounting tensions.
"Diplomatic methods need to be used, which do not include ultimatums and threats", he said.