Watch: New York Police Department update on Columbia University protests

Columbia University announced Monday that all classes will be held virtually and asked that students who don't live on campus to stay home following protests over the Israel-Hamas war that have led to arrests and caused a rabbi to urge Jewish students to stay away from the school a day before the start of Passover. The announcement comes after days of protests at the school which have raised concerns for the safety of the university's Jewish students and fueled a national debate over student demonstrations as campuses across the country grapple with growing unrest over the war in Gaza. Yale police arrested dozens of students on Monday after they declined to clear an encampment and Harvard closed its main lawn area to the public in anticipation of protests.