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This week Owen Bennett Jones and his guests on Newshour Extra explore the reasons behind the shocking level of fan violence at the Euro 2016 football championships in France. English and Russian supporters clashed both on the streets and inside the stadium, there were serious injuries, and tear gas was used by the police the break up the riots. We ask what motivates groups of young men to participate in group acts of violence, and to what extent they are organised by political groupings intent on fomenting unrest and confrontation with the police.

(Photo: a tear gas canister explodes as England fans clash with police in Marseille. Credit: Getty Images)