The students at an encampment at Columbia University who inspired a wave of pro-Palestinian demonstrations across the country dug in for their 10th day Friday, as administrators and police at college campuses from California to Connecticut wrestle with how to address protests that have seen scuffles with police and hundreds of arrests.

Officials at Columbia and some other schools have been negotiating with student protesters who have rebuffed police and doubled down. Other schools have quickly turned to law enforcement to douse demonstrations before they can take hold. After a tent encampment popped up Thursday at Indiana University Bloomington, police with shields and batons shoved into protesters and arrested 33. Hours later at the University of Connecticut, police tore down tents and arrested one person.

The clock is ticking as May commencement ceremonies near, putting added pressure on schools to clear demonstrations. At Columbia, protesters defiantly erected a tent encampment where many are set to graduate in front of families in just a few weeks.