He said BZ was part of chemical arsenals of the U.S., Britain and other North Atlantic Treaty Organisation countries, while the Soviet Union and Russian Federation never developed the agent.
Ryabkov also said Russian Federation would study a United Nations resolution on Syria proposed by the US, France and Britain, but added that it would be hard to reach a compromise on the issue, TASS reported. "We warned that such actions will not be left without consequences".
Volunteer first responders and activists said a chemical attack by the Syrian government killed more than 40 people in the town of Douma, which drew worldwide outrage and prompted Washington and its allies to consider a military response.
Saturday's attack prompted swift condemnation from western governments, who unequivocally pointed the finger of blame at Assad, who relies on Russian Federation and Iran in his war against armed opposition in Syria.
Late Friday night, the U.S. President Donald Trump announced that the U.S., United Kingdom and France jointly launched strikes targeting the Assad regime's chemical weapons capabilities after a suspected chemical attack killed dozens outside of Damascus.More news: Break Up California Into 3 Smaller States, Billionaire Urges
They agreed to "keep working closely" on the issue, Mrs May's office said in a statement.
Erdogan also told reporters on Friday that tensions between the two countries over a suspected chemical attack in the Damascus suburb of Douma now seem to have eased.
The Russian Defense Ministry on Friday accused Britain of staging a fake chemical attack in the Syrian town of Douma last weekend, a bold charge that comes amid Moscow's stern warnings to the West against striking Syria.
Russia's foreign minister Sergey Lavrov said earlier that Russian experts had inspected the site of the claimed attack and found no trace of chemical weapons.
U.N. Secretary-General Antonio Guterres, who briefed the council before the vote, stressed again "the need to avoid the situation from spiraling out of control" and for a political solution.More news: King of Kong Villain Billy Mitchell Stripped of Records
The Kremlin said Mr Putin warned against rushing to blame the Syrian government before conducting a "thorough and objective probe".
President Bashar al-Assad's government - which receives military backing from Russian Federation - has denied involvement in any chemical attack, calling the reports "fabricated". It also said Russian officers found no patients with chemical attack symptoms at a local hospital, and no indication of any burials of victims.
Lavrov noted that Russian and US militaries have a hotline to prevent incidents, adding that it's not clear if it would be sufficient amid mounting tensions.
Macron said Thursday on French national television France has proof that the Syrian government launched chlorine gas attacks and has crossed a line that could prompt French airstrikes.More news: Hamilton: Ferrari, Red Bull look 'really quick'