NATO Secretary General Jens Stoltenberg said on April 14 that the alliance "considers the use of chemical weapons unacceptable".
Stoltenberg stated that this would decrease the capacitates of Bashar Assad's regime on the new chemical weapon attacks.
At the same time, Stoltenberg expressed his conviction that those responsible for chemical attacks must be held to account.
"NATO considers the use of chemical weapons as a threat to global peace and security, and believes that it is essential to protect the Chemical Weapons Convention", the statement added.
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Vladimir Putin said the strikes were an "act of aggression" that would have a "destructive" influence on global relations.
President of the European Council Donald Tusk also supported the joint strikes. Chemical weapons can not be used with impunity.
Guterres' remarks came during a Security Council meeting on Friday, shortly before the strikes were launched in response to the alleged use of chemical weapons in the Syrian town of Douma on April 7.
"Strikes by US, France and United Kingdom make it clear that Syrian regime together with Russia & Iran can not continue this human tragedy, at least not without cost", Tusk posted on Twitter on Saturday.
North Atlantic Treaty Organisation has expressed support for the USA -led strike against Syria, calling it essential to enforce the Chemical Weapons Convention.