The Organization for the Prohibition of Chemical Weapons has adopted a plan to destroy Damascus' estimated 1,300-ton arsenal, which includes mustard gas and sarin, outside Syria, but has yet to find a country willing to host the risky operation.
"The remaining question is actually where we will be able to find a location," said UN secretary-general Ban Ki-moon.
US secretary of state John Kerry said "two alternatives" were being explored, but he didn't say what those might be.
Samantha Power, the US ambassador to the United Nations, told The Associated Press, "We are just entering the destruction phase", and still looking for a country where Syria's chemical weapons can be destroyed.