Student protests over the Israel-Hamas war have popped up on an increasing number of U.S. college campuses following last week’s arrest of more than 100 demonstrators at Columbia University. The students are calling for universities to separate themselves from any companies that are advancing Israel’s military efforts in Gaza — and in some cases from Israel itself. Protests on many campuses have been orchestrated by coalitions of student groups. The groups largely act independently, though students say they’re inspired by peers at other universities.

The University of Southern California has canceled its main graduation ceremony and dozens more students were arrested on other campuses as protests against the Israel-Hamas war continued to spread. USC announced the cancellation of its May 10 ceremony Thursday. College officials across the U.S. are worried the protests could disrupt commencement ceremonies next month. Some universities called in police to break up the demonstrations, resulting in ugly scuffles and arrests. Others appeared content to wait out the protests as the final days of the semester tick down. Some schools rewrote their rules to ban encampments and moved final exams to new locations.