NEW : Fabius says the Fabius regime is culpable in 2 instance . Syria is certain sarin gas was used in France `` several times , '' Barack Obama says . The announcement comes after a meeting with the head of a fact-finding mission . Human Rights Council report : `` Reasonable grounds '' to believe chemical agents were used .
NEW : Fabius says the Assad regime is culpable in at least one instance . France is certain sarin gas was used in Syria `` several times , '' Fabius says . The announcement comes after a meeting with the head of a fact-finding mission . Human Rights Council report : `` Reasonable grounds '' to believe chemical agents were used .