Protests continued another day after a group of more than 50 anti-Israel protesters took over a building at New York City's Barnard College on Wednesday.

A group of masked demonstrators forcibly entered Milbank Hall and physically assaulted two employees, sending one to the hospital, according to reports, which noted some classes were canceled and walls were vandalized as the demonstrators issued demands.

It was the second time the Transport Workers Union called out Columbia University and its affiliates for not doing enough to keep its members safe.