The head of the UN body investigating ‘the most serious crimes under international law’ during Syria’s 13-year civil war (IIIM) has told the new rulers that he is willing to hold talks and travel to secure evidence . “Some evidence has been lost in recent weeks, but it is too early to know the extent of it,” Robert Petit said at a press conference in Geneva on Tuesday. Follow all developments about the situation in Syria in our live blog.

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