The moves comes as Columbia is locked in negotiations with the Trump administration over federal funding.

When demonstrators occupied the university’s main library on Wednesday, campus security forces intervened aggressively. The occupation ended with arrests hours later.

A Columbia official said more than 65 Columbia students were placed on “interim suspension pending further investigation.” A total of 33 people, including from affiliated institutions, were barred from Columbia’s campus. Alumni who joined the demonstration were also barred from campus, the university official said.