GENEVA - The U.N.'s special envoy to Syria Lakhdar Brahimi says evidence suggests that some kind of chemical "substance" was used in an attack that killed hundreds of people, but said any military strike on Syria must have U.N. Security Council approval.
Brahimi spoke to reporters Wednesday in Geneva as a U.N. inspection team was investigating the alleged poison gas attack near Damascus on Aug. 21 and momentum built for Western military action against Syrian President Bashar Assad's.
Brahimi said that "it does seem like some kind of substance was used" that killed hundreds of people, but "international law says that any U.S.-led military action must be taken after" agreement in the 15-nation Security Council.
He added that President Barack Obama's administration is "not known to be trigger-happy."
Meanwhile, Britain says it will put forward a resolution Wednesday to the U.N. Security Council condemning the Syrian government for the alleged chemical attack that has killed hundreds of civilians.
A statement from Prime Minister David Cameron's office said Britain would seek a measure "authorizing necessary measures to protect civilians" in Syria. Military force is one of the options that can be authorized under Chapter 7 of the U.N. charter.
The decision came as momentum appeared to build for Western military action against Syria, with the U.S. and France saying they are in position for a military strike.
The prospect of a U.S.-led intervention into Syria's civil war stems from the West's assertion - still not endorsed by U.N. inspectors - that President Bashar Assad's government was responsible for an alleged chemical attack on civilians outside Damascus on Aug. 21, which Assad denies.
Doctors Without Borders says that attack killed 355 people.