Week-long demonstrations over a proposed rise in university tuition fees have erupted into violence in Quebec. Police in Montreal clashed with thousands of students who accuse the government of sabotaging negotiations for a settlement.

­Riot police have so far arrested 85 people after a government exclusion of a student group from talks triggered activist ire.

Students have flooded Montreal’s streets over the past few days, up in arms over tuition fee hikes that would see costs rise by 75 percent over the next five years.