What did Russia say at the UN?
Mr Nebenzia, presenting Russia’s case that rebels in Douma staged the event for their own ends, painted the incident and its fallout as part of a US-led effort to hurt Russia with a “broad arsenal of methods”, including slander, insults and “hawkish rhetoric”.
In an angry statement, he invited investigators from the Organisation for the Prohibition of Chemical Weapons (OPCW) to fly to Syria as soon as Tuesday, saying that Russian troops would escort them to the site of the alleged attack.
UK PM condemns ‘barbaric attack’ in Syria
Moscow has said its experts have not found “any trace of chlorine or any other chemical substance used against civilians”.
Mr Nebenzia said the tone taken against Russia had gone beyond what was acceptable even during the Cold War and warned against a US military response.
“Armed force under mendacious pretext against Syria, where, at the request of the legitimate government of a country, Russian troops have been deployed, could lead to grave repercussions,” he said.
What is the wider context?
Tensions between Russia and the West have plunged to their worst level in decades, following the poisoning in March of an ex-spy in England that the UK blamed on Moscow, and alleged Russian interference in the 2016 US election.
Russia v the West: Is this a new Cold War? The Cold War explained
The poisoning of Sergei Skripal and his daughter Yulia with what the British government says was a military-grade Novichok nerve agent of a type developed by Russia led to the mass expulsion of Russian diplomats by Western allies, to which Moscow responded in kind.