Columbia University professors dressed in commencement regalia and other supporters protest against the university’s recent actions against a pro-Palestinian students’ camp on campus, on the steps of Low Memorial Library in New York

The student camp on Columbia University’s campus, which is protesting against the university’s ties with Israel

Pro-Palestinian protesters march outside Columbia University in New York

Pro-Israel demonstrators chant ‘shame’ in support of a Columbia University assistant professor, Shai Davidai, who was denied access to the main campus to prevent him from going to the lawn occupied by pro-Palestine student demonstrators

Barnard professors walk out of class in support of students suspended for protesting for Palestine at Columbia University

Pro-Palestine demonstrators gather inside and outside the locked gates of the Columbia University campus in New York

Pro-Palestine and anti-Hamas stickers are posted around the campus of Columbia University

Students and faculty members on the campus of Columbia University

Pro-Palestinian protesters set up a tent encampment in front of Sproul Hall on the UC Berkeley campus in California

Pro-Palestinian protesters demonstrate on the UC Berkeley campus

Yale students build a cardboard prop during a protest on a quad in front of the Sterling Memorial Library

Students of New York University hold a Gaza solidarity encampment outside the NYU Stern School of Business

Pro-Palestinian students and faculty of New York University inspired by Columbia University occupy a plaza on campus and declare it a Gaza solidarity encampment

Pro-Palestine protesters at New York University

Protesters perform prayers as police intervene and arrest more than 100 students at New York University

Police arrest students at New York University who continue their demonstration on campus in solidarity with the students at Columbia University and to oppose Israel’s attacks on Gaza

Workers construct barricades at NYU’s Stern School of Business after students and faculty were arrested after setting up a Gaza solidarity encampment at Gould Plaza

A pro-Israel protester waves an Israeli flag across the street from a pro-Palestine demonstration at New York University

A pro-Palestine demonstrator at a protest encampment on the Columbia University campus in New York

Protesters from Massachusetts Institute of Technology, Harvard and others at a protest encampment on MIT’s Kresge Lawn

MIT students at a tent city on campus

Students at Emerson College occupy a tent city adjacent to the college campus as they protest against Emerson’s ties to Israel

Pro-Palestinian students protest in Kogan Plaza at George Washington University

Student and community members perform a dabke, a traditional Palestinian dance, in support of pro-Palestinian protesters locked inside Siemens Hall at Cal Poly Humboldt in Arcata, California