Independent International Commission of Inquiry on Syria said that evidence points to the use of sarin by Syrian rebel forces . France : Fabius says the Assad regime is culpable in at least one instance . France is certain sarin gas was used in Syria ` ` several times , '' Fabius said . The announcement came after a meeting with the head of a fact - finding mission . Human Rights Council report : ` ` Reasonable grounds '' to believe chemical agents were used .
France : Fabius says the Assad regime is culpable in at least one instance . France is certain sarin gas was used in Syria ` ` several times , '' Fabius said . The announcement came after a meeting with the head of a fact - finding mission . Human Rights Council report : ` ` Reasonable grounds '' to believe chemical agents were used .