French Foreign Minister Jean-Marc Ayrault said today that "a day will come when international justice will give its verdict on Bashar al-Assad who is massacring his people."
Speaking to news channel CNEWS, he added: "These crimes must not go unpunished. In any case, there are investigations, United Nations commissions... There will be a war crimes trial."
At least 86 people were killed on Tuesday in rebel-held Khan Sheikhun in northern Syria in a suspected chemical attack that left people choking and foaming at the mouth.
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"It's difficult because up to now every time we have presented a resolution, there has been a veto by Russia and sometimes by China ... But we must cooperate because we need to stop this massacre," he added.
Moscow, which launched a military intervention in 2015 in support of Assad's forces, has defended the Syrian government against accusations it is responsible for the attack.
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