The attack has drawn global outrage and prompted the United States and its allies to consider a military strike on Syria, something Moscow has strongly warned against.
"The immediate priority is to avert the danger of war", Ambassador Vassily Nebenzia told reporters following a closed-door meeting of the Security Council.
Asked if he meant war between the United States and Russian Federation, he said: "We can not exclude any possibilities unfortunately".
The United Nations called an emergency meeting with world leaders to discuss how to handle the crisis in Syria.
But by Thursday, both sides appeared anxious to dial down the rhetoric, and it was the Russians who took the biggest step back, redefining what would prompt them to respond militarily to any US -led punitive raids on Syria.
The Syrian government had strongly rejected those allegations, calling on the Organization for the Prohibition of Chemical Weapons (OPCW) to promptly investigate.
Sheikh Naim Qassem, deputy leader of the Iranian-backed Hezbollah, told Lebanese daily al-Joumhouria: "The conditions do not point to a total war happening ... unless Trump and (Israeli leader Benjamin) Netanyahu completely lose their minds".
The coalition forces especially the USA and Russian Federation need to be sensitive over the use of conventional weapons, he said.
"Asked about Trump's tweet about an impending attack on Syria, former Defense Secretary William Cohen, who ran the Pentagon for President Bill Clinton, said on CNN that it "compromises the mission somewhat".
It's a nightmare scenario for Syria: The United States launches strikes on Syrian targets, killing Russians, and Moscow is forced to defend itself or retaliate.
Shortly after his tweeted warning to Russia, Trump took a more conciliatory tone in lamenting that the U.S. -Russia relationship "is worse now than it has ever been".
"The sole thing they have an interest in is to oust the Syrian government and more broadly to contain the Russian Federation", he said.
13 de abril de 2018, 16:20Moscow, Apr 13 (Prensa Latina) Russia denounced the execution of an alleged chemical attack in the Syrian city of Duma and claimed to have reliable evidence on the special services involved in that case.
In a move that will see the superpowers on course to collide with one another, the US President seemingly warned his Russian counterpart to get ready for the oncoming arsenal of US weapons.
Moscow bureau chief Anton Troianovski describes Russia's increasing tensions with the US and how state media outlets are covering the alleged chemical weapons attack in Syria.
United States allies have offered strong words of support for Washington but no clear military plans have yet emerged.
"We'll be coming out of Syria very soon".
"We're still assessing the intelligence, ourselves and our allies", Mattis said. That clinched a huge victory for President Assad, crushing a long rebellion in the eastern Ghouta region near Damascus. Russian Federation has told the United States and its allies not to carry out any military strike.