At Columbia University, tensions between the administration and students protesting over Israel's war in Gaza have reached the point that scores of New York City police marched onto campus to clear an encampment and arrest demonstrators who had commandeered a classroom building.

More than 100 people were taken into custody during the Columbia crackdown, just a fraction of the total arrests stemming from recent campus protests over the Israel-Hamas war.

Police removed barricades and began dismantling a pro-Palestinian demonstrators’ fortified encampment early Thursday at the University of California, Los Angeles, after hundreds of protesters defied orders to leave.