"We have indications of the use of a toxic industrial chemical, probably chlorine, in Syria this month in the opposition-dominated village of Kfar Zeita. We are examining allegations that the government was responsible," White House Press Secretary Jay Carney told reporters.
He said the US is working to determine what took place and and who was responsible. It will continue consulting and sharing information with key partners, including chemical weapons watchdog OPCW (Organisation for the Prohibition of Chemical Weapons).
"We're examining allegations that the (Bashar al-Assad) regime was responsible. We continue the process with our partners that Syria committed - the Assad regime as well as Russia committed to that has led now to more than 65 per cent of the Syrian regime's stockpiles of chemical weapons being removed for destruction, and that process continues," he said.