Staffan de Mistura
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UN envoy to Syria on push for localised ceasefire in Aleppo

Four years since the war in Syria in began, efforts even to agree a freeze on hostilities in one area in the conflict are proving difficult.

The UN Envoy to Syria, Staffan de Mistura, has said the plan for a local ceasefire in Aleppo was intended to serve as a foundation to move toward broader political negotiations to end a war that has already claimed more than 220,000 lives.

The BBC's Lyse Doucet asked Staffan de Mistura what President Assad had agreed to.

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