The rector of Aristotle University of Thessaloniki, in Greece, was injured during a student protest on Wednesday that turned violent, according to Kathimerini, a newspaper in Athens.

Universities across Greece have been roiled by violence this week, as students have attempted to disrupt the elections of university rectors, which are taking place as the academic year draws to a close. Greek universities are highly politicized, with the national political parties represented on most campuses by student groups that take an active role in university governance.

Students, especially on the left of the political spectrum, have largely opposed government-proposed reforms that they fear could lead to the eventual privatization of universities and higher costs. The passage last year in parliament of a bill allowing for the measures sparked riots in Athens.

The education minister condemned the violence at Aristotle University as unacceptable and stressed that planned reforms would go ahead, Kathimerini reported. The paper said that university professors across Greece had called a two-day strike as a result of this week’s violence “to protest ongoing upheaval in the education sector.” —Aisha Labi