Clashes break out before curfew in Ferguson

Fresh clashes have broken out between police and demonstrators in Ferguson, the suburb of St Louis in the US state of Missouri, where an unarmed black teenager was shot by police just over a week ago.

Police fired tear gas at a crowd of protestors ahead of a second night of curfew.

US Attorney General Eric Holder has ordered a federal post-mortem on the body of Michael Brown, 18, to take place "as soon as possible".

Aleem Maqbool reports from Ferguson.