Columbia students reported feeling threatened when masked protesters stormed the campus library, chanted anti-Israel slogans, and mocked the Israeli hostage crisis.

Columbia University has suspended dozens of students and barred alums and others who participated in a pro-Palestinian demonstration inside the school’s main library earlier this week.

Columbia University has suspended more than 65 students for their role in a pro-Palestinian demonstration that forced the shutdown of the main campus library, a school official said on Friday. The students were placed on interim suspension and will be prohibited from taking their final exams or entering campus except to access their dormitories,