NEW YORK (AP) Columbia canceled in-person classes, dozens of protesters were arrested at New York University and Yale, and the gates to Harvard Yard were closed to the public Monday as some of the most prestigious U.S. universities sought to defuse campus tensions over Israels war with Hamas .

More than 100 pro-Palestinian demonstrators who had camped out on Columbias green were arrested last week, and similar encampments have sprouted up at universities around the country as schools struggle with where to draw the line between allowing free expression while maintaining safe and inclusive campuses.

At New York University, an encampment set up by students swelled to hundreds of protesters throughout the day Monday. The school said it warned the crowd to leave, then called in the police after the scene became disorderly and the university said it learned of reports of intimidating chants and several antisemitic incidents. Shortly after 8:30 p.m., officers began making arrests.

Its a really outrageous crackdown by the university to allow the police to arrest students on our own campus, said New York University law student Byul Yoon.

Antisemitism is never ok. Thats absolutely not what we stand for and thats why there are so many Jewish comrades that are here with us today, Yoon said.