She has described the attack in Douma, just east of the capital Damascus, as barbaric.
Maj Gen Konashenkov said Britain was "directly involved in the provocation". But he said he personally believes it was an "inexcusable" use of chemical weapons.
An ally of Assad's Syrian government Russian Federation has deployed military police in Douma after the town was sieged by Bashar al-Assad's forces on Wednesday.
The investigators, who are mandated to determine only if chemical weapons were used and not who used them, were expected to start their investigations into the Douma incident on Saturday, the Netherlands-based organization said.
Hours later, the Russian Embassy in Damascus said no Russians were known to have been hurt in the overnight airstrike.
Haley's message came after her Russian counterpart, Vassily Nebenzia, said he would ask the Security Council to condemn the predawn military strikes on Syria by the U.S., France and Britain - calling the attacks a violation of global law and the U.N. Charter.
One senior official said Trump has asked his military to consider options that would include punishing Russian Federation and Iran, Syria's main foreign backers, in part over the president's growing level of exasperation with Putin.
Russia's foreign minister says Moscow has received a document from a Swiss lab that analyzed the samples in the nerve agent poisoning of an ex-Russian spy, which points at a Western-designed nerve agent as a likely cause. He didn't elaborate or name the state.
Vladimir Shamanov, who chairs the defense committee of the lower house, said the vessels had departed the Mediterranean base for their own safety - "normal practice" when there were threats of attack.
According to a statement by the French presidency, Macron called for dialogue between France and Russian Federation to "continue and intensify" to bring peace and stability to Syria.
"The most important thing is to refrain from ill-considered and unsafe actions that would constitute a gross violation of the UN Charter and would have unpredictable consequences", Putin's office said in a statement after he and French President Emmanuel Macron spoke by telephone.
"This is grotesque", Pierce told reporters as she left an emergency meeting of the U.N. Security Council. He said "the Cold War is back - with a vengeance but with a difference", because safeguards that managed the risk of escalation in the past, "no longer seem to be present".
Pleasant Saturday, strong to severe storms possible Sunday
The clash in air masses and the vigorous nature of this storm system will all contribute to the chances for severe weather today. The front is forecast to bring numerous showers and thunderstorms, forecasters said in an alert Friday .
Addressing the Security Council, Nikki Haley, the U.S ambassador to the United Nations, said Russian Federation used veto to "kill" the Joint Investigative Mechanism, the tool to figure out who used chemical weapons. She said of the alleged chemical attack that "Russia can complain all it wants about fake news, but no one is buying its lies and its cover-ups". "Get ready, Russia, because they will be coming, nice and new and smart!"
" We hope that there will be no point of return - that the USA and their allies will refrain from military action against a sovereign state", Nebenzia informed press reporters late Thursday evening hours.
Trump himself appeared on Thursday to cast doubt on at least the timing of any USA -led military action, tweeting: "Never said when an attack on Syria would take place".
Minister of Foreign Affairs, Sergey Lavrov said, "These acts are illegal and unacceptable". The United States was effectively inviting the neighborhood brutalizer (don't forget the ongoing bombing of innocent civilians in Syria) over for coffee the day after he attacked its best friend.
McKenzie said 105 U.S. and allied missiles were fired, of which 66 were Tomahawk cruise missiles launched from aboard three U.S. Navy ships and one Navy submarine.
Asked about the risks of USA military retaliation, Mattis cited two concerns, starting with avoiding civilian casualties.
Shaaban concluded by saying that Syrian President Bashar al-Assad has always been strong and calm.
Russian Federation has thousands of troops and military advisers in Syria as well as dozens of aircraft at its Hmeimim air base and 10 to 15 warships in the Mediterranean off the coast of Syria. Apart from Macron's phone conversation with Putin, NATO members Germany and the Netherlands have said they will not take part in any military action.
Putin also reaffirmed Russia's view that the alleged chemical attack in the Syrian town of Douma that prompted the strike was a fake. Sanders said the president's national security team to discuss the options regarding Syria.
Asked if he meant war between the United States and Russian Federation, he said: "We can not exclude any possibilities unfortunately".
The capture of Douma has clinched a major victory for Mr Assad, crushing what was once a centre of the insurgency near Damascus, and underlines his unassailable position in the war, which entered its eighth year last month.