The U.S., United Kingdom and France launched targeted missiles strikes on Syria in retaliation for an apparent chemical attack by the regime of Bashar al-Assad on a rebel town.
Separate analysis by the United States, France and Britain have concluded that a chemical attack took place on Saturday in the rebel-held town of Douma, said Haley.
One senior official said Trump has asked his military to consider options that would include punishing Russian Federation and Iran - Syria's other main foreign backer - in part over his growing level of exasperation with Putin.
"To Iran and Russian Federation I ask - what kind of nation wants to be associated with the mass murder of innocent men, women and children", the President said.
There is a greater risk of great power conflict erupting in Syria than there has been at any time since the end of the Cold War, and if Russian military personnel are killed by USA or allied strikes there is no telling how quickly things could deteriorate there and in other parts of the world.
The Syria crisis has come as a test for not only Trump, but incoming National Security Adviser John Bolton, a hawk who joined Trump's team this week. In 2013, Parliament defeated a call by then-Prime Minister David Cameron for airstrikes in response to an earlier chemical attack in Syria.
Asked about concerns in planning a strike on Assad's regime, Mattis cited worry over inadvertently causing civilian casualties and avoiding anything that would trigger a wider war. Trump had dialled down the rhetoric on Thursday.
He is troubled by the similarly gruesome pictures of suffocating children, but his tougher stance this time is driven in part by his hardened view of Putin and his belief that Assad did not learn a lesson from the first strike, officials said. "But should the United States and our allies decide to act in Syria, it will be in defense of a principle on which we all agree".
Russian Federation in the past week also sought to counter USA diplomatic efforts to marshal global support for its condemnation of the Syrian government led byAssad, who the US has concluded ordered the chemical attack that killed dozens of Syrian civilians in the East Goutha suburb of Damascus. The United States would not be going to war with Assad or his chief allies, Russian Federation and Iran.
The US, France, and Britain announced a joint operation against Syria's government, a week after a suspected chemical attack outside the capital Damascus left more than 40 people dead.
Speaking to reporters in Moscow, Mr Lavrov reiterated a strong warning to the West against military action in Syria, saying it would increase flows of refugees into Europe.
The former missile base was assessed to have been used by the Syrian regime to "keep chemical weapon precursors stockpiled in breach of Syria's obligations under the Chemical Weapons Convention", the MoD said in a statement.
The White House has said the mission to fight Islamic State in Syria was "coming to a rapid end" while offering no timetable for US withdrawal.
In a statement released on Thursday night, a Downing Street spokeswoman said: "The Prime Minister spoke to President Trump about Syria this evening". It's an endeavor that is projected to cost at least $100 billion and take at least 10 years to complete.