"The current escalation of the situation around Syria has a devastating impact on the whole system of global relations", Mr Putin added.
Trump had said "mission accomplished" on Twitter after the strikes, though U.S. Lieutenant General Kenneth McKenzie at the Pentagon acknowledged elements of the programme remain and he could not guarantee that Syria would be unable to conduct a chemical attack in the future.
Russia's ambassador to the USA warned that there would be consequences for the attacks.
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"Again, we are being threatened".
Antov added that it was not acceptable to insult Russia's president: "Insulting the President of Russian Federation is unacceptable and inadmissible".
Syria released video of the wreckage of a bombed-out research lab, but also of Mr Assad arriving at work as usual, with the caption "morning of resilience" and there were no immediate reports of casualties.
"The US - the possessor of the biggest arsenal of chemical weapons - has no moral right to blame other countries".
"The barbaric aggression. will not affect in any way the determination and insistence of the Syrian people and their heroic armed forces", state news agency SANA cited an official source in the Syrian foreign ministry as saying.
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In Washington, a senior administration official said that "while the available information is much greater on the chlorine use, we do have significant information that also points to sarin use" in the attack.
"The United States and its allies have no proof and, without even waiting for the Organisation for the Prohibition of Chemical Weapons to take a position, have carried out this military attack. and are responsible for the regional consequences", said foreign ministry spokesman Bahram Ghasemi on his Telegram channel.
"They are hard for us, but will do more damage to the United States of America and Europe", RIA quoted Serebrennikov as saying.
Explosions were heard in Damascus, Homs and elsewhere in Syria.
Assad told a group of visiting Russian lawmakers that the Western missile strikes were an act of aggression, Russian news agencies reported.
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A senior official in a regional alliance that backs Damascus said the Syrian government absorbed the attacks, adding that the targeted sites were evacuated days ago thanks to a warning from Russian Federation.