Negotiations between the Quebec government and representatives of striking students broke down on Wednesday, The Gazette, a newspaper in Montreal, reported. Student strikes, affecting campuses throughout the province, are in their 11th week and have been marked by increasing violence, especially in Montreal, where hundreds of thousands of people have marched in some protests. Talks began Monday after the three student associations agreed to suspend protest action for 48 hours, but on Wednesday, the minister of education barred the largest association, known by the acronym Classé, from the negotiations, saying it had broken the 48-hour truce. Classé denied the allegation, and the other two associations said they would not continue talking. The students are protesting tuition increases of 75 percent over the next five years.