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.

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.

Barnard College officials say pro-Palestinian protesters wearing kaffiyeh scarves and masks pushed their way into Milbank Hall, which houses the offices of the dean, and assaulted a school employee.