The UN chief spoke by phone with the ambassadors from the five permanent council members - Britain, France, China, Russia and the United States - to express his "deep concern" about the deadlock at the council over Syria.
Russia's military said on Thursday that Douma was now under full control of the Syrian government after a Russian-mediated deal secured the evacuation of the rebels and thousands of civilians after it was recaptured by Syrian forces.
Nikki Haley told an emergency meeting of the UN Security Council called by Russian Federation that should the U.S. and its allies decide to act in Syria it will be to defend "a bedrock worldwide norm that benefits all nations" - the prohibition on the use of chemical weapons.
Emotions should not be allowed to overrule what the president has thought and expressed many times: While the outcome of Syria's civil war may mean everything to Assad, and much to Russia, Turkey, Saudi Arabia, Iran and Israel, it means comparatively little to a United States of America 5,000 miles away.
NBC News reported that the USA officials said they were "confident" that chemical weapons have been used in Syria though not one-hundred percent sure.
Russian Federation has dismissed the purported chemical attack as fake and strongly warned the US and its allies against launching a military strike in Syria. But U.S. intelligence agencies have not completed their assessment or reached a final conclusion, the officials said.
At least 40 dead in suspected chemical weapons attack in Syria IBTimes US.
"We are continuing to asses intelligence and are engaged in conversations with our partners and allies", White House press secretary Sarah Sanders said in a statement on Thursday, noting Trump's calls with May and Macron. The White House also confirmed that Trump had spoken with French President Emmanuel Macron.
Prime Minister Theresa May said it is highly likely that Assad's government was responsible for the attack.
The No 10 statement issued following the Cabinet meeting said Mrs May had again described the attack on Douma as a "shocking and barbaric act" which represented a further erosion of global law. A Downing Street spokesperson added: "They agreed it was vital that the use of chemical weapons did not go unchallenged, and on the need to deter the further use of chemical weapons by the Assad regime".
"I think his national security advisers have advised him to get a coalition involved with this, to include the UK, French, perhaps the Jordanians, the Egyptians, Israelis, Saudis and Emirates - a coalition of the willing that can represent a very broad front", said McInerney.
A fact-finding mission from the Organization for the Prohibition of Chemical Weapons is expected to arrive in Douma on Saturday.
Trump allowed his revulsion at the terrible pictures of dead children, allegedly gassed, to impel him to threaten military action nearly certain to result in more dead children.
U.S. Defense Secretary Jim Mattis told Congress on Thursday morning that he was convinced that there was a chemical attack in Syria.
But while 60% of Brits support the enforcement of a no fly zone, 43% of people said they would oppose missile strikes on Syria.
What can possibly be achieved by more bombing? "Because we know the Al-Nusra forces do not have aircraft", said McInerney, who adds that USA -led surveillance ought to provide critical evidence on whether the attack came from the air, although it may take time to comb through the intelligence.
"Meanwhile, Iran has enough political and operational tools, both inside and outside the region, that all of which are taken into consideration by the U.S. officials, especially the military officials", concluded Tajik.
The U.S., France and Britain have been consulting about launching a military strike in Syria.
Russian lawmakers have warned the United States that Moscow would view an airstrike on Syria as a war crime and that it could trigger a direct U.S-Russian military clash.