U.S. Defense Secretary Chuck Hagel says the United States will continue to seek an international coalition in response to Syria's alleged use of chemical weapons, despite opposition by British lawmakers to any military action.

"Our approach is to continue to find an international coalition that will act together," Hagel said in Manila Friday, after Britain's lower house of Parliament rejected a motion for British participation in a military strike. The non-binding vote is a setback to British Prime Minister David Cameron, who told lawmakers a military strike would be a response to a war crime, not an attempt to topple the Syrian government.