Police officers and university administrators have clashed with pro-Palestinian protesters on a growing number of college campuses in recent weeks, arresting students, removing encampments and threatening academic consequences. More than 2,000 people have been arrested or detained on campuses across the country.

The fresh wave of student activism against the war in Gaza was sparked by the arrests of at least 108 protesters at Columbia University on April 18, after administrators appeared before Congress and promised a crackdown. Since then, tensions between protesters, universities and the police have risen, prompting law enforcement to take action in some of America’s largest cities.