Student anti-war protesters at U.S. universities are digging in and vowing to keep their demonstrations going, some universities moved to shut down encampments after reports of antisemitic activity among the protesters. Police in riot gear cleared an encampment on the campus of Northeastern University in Boston on Saturday. Several dozen students shouted and booed at them from a distance, but the scene was otherwise not confrontational. The school said in a statement that the demonstration, which began two days ago, had become “infiltrated by professional organizers” with no affiliation to the school and protesters had used antisemitic slurs. The University of Pennsylvania took similar action Friday.

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.