NATO Secretary General Jens Stoltenberg on Saturday backed the joint airstrikes carried out by the US, United Kingdom and France in Syria.
Meanwhile, UN Secretary-General Antonio Guterres has urged the members of the organisation to show moderation in the prevailing "dangerous" climate and to respect worldwide law.
"NATO has consistently condemned Syria's continued use of chemical weapons as a clear breach of global norms and agreements", Stoltenberg said in a statement.
"I call on the members of the Security Council to unite and exercise that responsibility", Guterres said.
"The objective of the meeting is to hear information from the United States, France and Britain on the latest developments in Syria", - said in the headquarters of North Atlantic Treaty Organisation.
"The use of chemical weapons is unacceptable, and those responsible must be held accountable", Stoltenberg said.
President of the European Council Donald Tusk also supported the joint strikes.
On April 7, the volunteer organizations reported that the chemical attack at Douma, the East Ghouta took place. "This night, under America's guidance, the United States, France and Britain acted accordingly (because) Syria continues to carry out its murderous actions", the official, who declined to be identified, was quoted as saying.
Last week, a gas attack in Syria had killed at least 60 people and injured several others.