At Columbia, demonstrators vowed to remain until their demands are met, including that the school divest all financial holdings linked to Israel.
The university has rejected the demand, with president Minouche Shafik saying talks with students had collapsed.
“Students occupying the building face expulsion,” Columbia’s Office of Public Affairs said in a statement, adding that the protesters were provided “the opportunity to leave peacefully” but instead declined and escalated the situation.
The university outlined in a press update on Tuesday that those in the encampments and Hamilton Hall “number in the dozens”, while nearly 37,000 attend Columbia.
On Tuesday evening, police could be seen outside the university, according to footage on CNN.
