During a phone call late on Thursday, UK Prime Minister Theresa May and US President Donald Trump agreed on the need to deter chemical weapon use in Syria. He accused the United States, France and Britain of "demonstrating a blatant disregard for global law".
There was no word from Russian President Vladimir Putin himself, though his foreign minister, Sergei Lavrov, said Moscow was in contact with Washington to discuss an atmosphere which he described as alarming.
Friday: "Today, the Russian defense ministry has other evidence proving the United Kingdom's direct involvement in the organization of this provocation in Eastern Ghouta", Igor Konashenkov, Russia's defense ministry spokesman, said, according to the Russian government news site Tass.
Russian Federation has warned the United States that launching airstrikes in response to a suspected chemical attack in Syria could spark a war between the two countries and accused Washington of putting worldwide peace at risk.
Striking a conciliatory note, Macron's office said: "The President of the Republic called for dialogue with Russian Federation to be maintained and stepped up to bring peace and stability back to Syria".
The call for action came after a suspected chemical attack on the rebel-held town of Douma in the Eastern Ghouta last week killed over 70 people.
"We warned about this long ago", he said.
The council failed on Tuesday to approve three draft resolutions on chemical weapons attacks in Syria. The Kremlin readout said that Putin warned against rushing to blame the Syrian government before conducting a "thorough and objective probe". "I hope no one would dare to launch such an adventure now", Lavrov said.
Russian officials and President Trump have US have exchanged heated rhetoric since Trump began talk of a USA response to the alleged chemical attack throughout the past week.
He noted that the Russian and US militaries have a hotline to prevent incidents, adding that it's not clear if it would be sufficient amid mounting tensions.
The investigators, who are only mandated to determine if chemical weapons were used and not who used them, were expected to start their investigations into the Douma incident on Saturday, the Netherlands-based agency said.
A first team of experts from the global Organisation for the Prohibition of Chemical Weapons has arrived in Syria, U.N. Secretary-General Antonio Guterres said.
"Why didn't you wait for the outcome of the investigation you called for?"
Trump himself appeared on Thursday to cast doubt on at least the timing of any US -led military action, tweeting: "Never said when an attack on Syria would take place". It "could be very soon or not so soon at all".
A year later, Trump finds himself again weighing his response to a suspected poison gas attack by Assad's forces, this time in the town of Douma last weekend.
Guterres said he has asked Syrian special envoy Staffan de Mistura to come to NY as soon as possible to consult "on the most effective way to accelerate the political process".