France’s president Francois Hollande has said the international community is obliged to act as more proof of the use of chemical weapons in Syria emerges.
"We have the elements which now allow us to give certainty over the use of chemical weapons in Syria - at what level we still do not know."
"What has happened in Syria must be one more piece of pressure that can be put on the Syrian regime and its allies," he said on Wednesday.
Hollande spoke as Syrian forces retook the town of Qusair from rebels, after a two-week blockade.
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