A total of 87 people, including many children, died in the suspected sarin attack on the rebel-held town of Khan Sheikhoun in Idlib province on Tuesday.
US President Donald Trump is discussing with members of his administration the possibility of introducing sanctions against Russian Federation and Iran for supporting the Syrian government, US Ambassador to the United Nations Nikki Haley said Sunday. "If we would want to appeal rationally to Russia", McMaster said. Secondly, we don't see a peaceful Syria with Assad in there.
While Tillerson told reporters that "steps are under way" to mobilize a coalition to remove Assad, he said that effort would probably come after Islamic State terrorists in the country are defeated and some stability returns to the Middle East country. Activist Alaa Al-Youssef said that the strike which killed a woman hit a residential neighbourhood.
The latest chemical attack has already drawn a hypocritical response from the United States, which launched Tomahawk missiles at an Assad airbase.
"The failure related to the recent strike and the recent bad chemical weapons attack in large measure is a failure on Russia's part to achieve its commitment to the global community", he added.
The official also said that the USA bombing was meant to send a message to the Syrian regime that any use of chemical weapon will not be tolerated by the US.
McCain - who vocally supported the USA military response to the attack - added that the White House must put forward a detailed Syria strategy.
"Once Daesh threat has been reduced or eliminated, I think we can turn our attention directly to stabilising the situation in Syria", he said.
When asked if President Trump could order more air strikes against the Syrian regime, she said: "If he needs to do more, he will do more". The use of the Sarin nerve gas, which has already killed more than 80 people and will likely affect thousands more, is a gross violation of humanitarian and worldwide law.
Much of the global community accused Assad's government of responsibility for that attack, though Damascus involved responsibility.
Britain has fully supported the USA for its response to the alleged use of chemical weapons in Idlib province of Syria that left almost 80 civilians dead.
Mr Johnson, who called off a trip to Moscow on Monday, is attempting to co-ordinate a united response from the G7 group of industrialised nations, whose foreign ministers meet in Italy this week.