Anti-Israel protests at Columbia University

That last discussion was unsuccessful. Within hours, police had arrested dozens of people on burglary and trespassing charges, including at least 30 students, six alumni and two Columbia employees, and cleared out protest encampments that had spawned dozens of similar demonstrations at colleges around the world.

USC, a private university, has been the subject of student protests over the war in Gaza as well as the administration's decision to cancel a commencement speech by the valedictorian, a Muslim student who had expressed support for Palestinians.

At Tuesday's pro-Palestinian protests at Columbia University and The City College of New York, 282 people were arrested, according to the New York Police Department. Of the 112 people arrested at Columbia, 32 (or 29%) were not affiliated with the university, according to an NYPD official.