Secretary-General Antonio Guterres warned Friday that escalation between Russian Federation and the US and its allies over the crisis in Syria risks "spiraling out of control" and poses a serious threat to global peace and security.
Russia's defence ministry claimed the whole attack was faked and it has proof that Britain participated in staging it.
"In Syria, we see confrontations and proxy wars involving several national armies, a number of armed opposition groups, many national and worldwide militia, foreign fighters from everywhere in the world, and various terrorist organizations", Guterres said.
Mr Konashenkov released statements from medics at Douma's hospital which claim a group of people with video cameras entered the hospital, shouting that its patients were struck with chemical weapons and caused a mass panic.
An allegation was made by Russian Federation on the United Kingdom faking an attack, which Britain dismissed stating it to be a "grotesque, blatant lie".
Ms Pierce said she wanted "to state categorically. that Britain has no involvement and would never have any involvement in the use of a chemical weapon".
"The Cold War is back - with a vengeance but with a difference", Guterres told the Security Council during a meeting requested by Russian Federation.
The Cold War is "back with vengeance", said the UN's Secretary General, Antonio Guterres, who also warned about the dangers of escalation over Syria. But the secretary-general took a much broader view of the often-interlinked factors escalating the chaos and threatening peace in the Middle East.
"Increasing tensions and the inability to reach a compromise in the establishment of an accountability mechanism threaten to lead to a full-blown military escalation", he warned.
A day before a team from the global chemical weapons watchdog was to arrive in Douma, just east of Damascus, Russian Defense Ministry spokesman Major General Igor Konashenkov said that images of victims of the purported attack were staged with "Britain's direct involvement", without providing evidence.
11 April trump said about the impending missile strike on Syria.
The United States has accused the Syrian government of using banned chemical weapons at least 50 times since the civil war began seven years ago.
A Downing Street spokesperson said Prime Minister Theresa May and French President Emmanuel Macron had agreed to "keep working closely together on the global response" during a phone call late on Friday.
Syria warned it will have "no other choice" but to defend itself if the West launches military action.
Addressing the Security Council, Vassily Nebenzia, Russia's United Nations envoy, lashed out at Washington, accusing it of a "reckless" response "unworthy of their status as a permanent member" of the Security Council.