Russian Foreign Minister Sergei Lavrov has said a reported chemical attack in Syria was staged by foreign agents.
A spokesman for Russia’s defence ministry accused the UK of being involved in staging the attack.
The US and France say they have proof it took place and, alongside the UK, are considering military retaliation.
Russia, which has military forces deployed in Syria in support of the government, has warned that Western air strikes risk starting a war.
During a press briefing on Friday, Mr Lavrov said he had “irrefutable evidence” that the attack was staged as part of a “Russophobic campaign” led by one country, which he did not name.