杭州夜网论坛“I would once again beseech you to refrain from the plans that you’re currently developing,” Moscow’s UN envoy Vasily Nebenzia said on Tuesday.
He warned Washington that it will “bear responsibility” for any “illegal military adventure” it carries out.
But Western leaders say they have agreed to work together to target those responsible for the attack in Douma.
French President Emmanuel Macron said any strikes would target Syrian government chemical facilities.
The warning from Moscow came during a divided meeting of the UN Security Council in which a proposal to open a new inquiry into the alleged attack failed to pass.
Russia vetoed the US-drafted resolution and China abstained. A counter-measure proposed by Moscow also failed to garner enough support.
The US proposal called for an independent investigation into claims that Syrian President Bashar al-Assad’s regime carried out the suspected chemical attack on the rebel-held town of Douma, in the Eastern Ghouta region.杭州夜网论坛
Syria – which receives military backing from Russia – denies being behind any chemical attack.
The UN session was the latest in a series of showdowns between Russia and the US and saw harsh words exchanged between the countries.
Mr Nebenzia accused the US of “planting this resolution” as a “pretext” to justify military action.
“We could find ourselves on the threshold of some very sad and serious events,” he said.
US envoy Nikki Haley responded by calling the vote a “travesty”.
“Russia has trashed the credibility of the council,” she said.
US President Donald Trump has promised a “forceful” response, and has spoken of numerous military options.
He cancelled his first official trip to Latin America to focus on Syria. His Defence Secretary, James Mattis, has also cancelled travel plans.
Mr Trump’s decision suggests the US response may involve a larger military operation than a limited strike, says the BBC’s Barbara Plett Usher in Washington.
Last April, after a Sarin nerve agent attack killed more than 80 people in a Syrian opposition-held town, Mr Trump ordered the firing of dozens of cruise missiles at a Syrian government air base from US Navy ships in the Mediterranean.杭州夜网论坛
It was the first direct US military action against forces commanded by President Assad.
Since Saturday’s incident, Washington has been in discussion with Britain and France, raising the prospect of co-ordinated Western military action.
A US Navy guided-missile destroyer, the USS Donald Cook, is in the Mediterranean.