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It is clear that this is how Bashar al-Assad operates: with brutal, unabashed barbarism, it is also clear that this horrific conflict, now in its seventh year, demands a genuine ceasefire and the supporters of the armed combatants in the region need to ensure compliance. We call upon Russia and Iran, yet again, to exercise their influence over the Syrian regime and to guarantee that this sort of horrific attack never happens again. As the self-proclaimed guarantors to the ceasefire negotiated in Astana, Russia and Iran also bear great moral responsibility for these deaths.