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.

A Pro-Palestinian protest unfolded at Barnard College in New York City on Wednesday, where a small group “forcibly entered” a campus hall and allegedly physically assaulted a school employee, college officials said.

A pro-Palestinian sit-in at Barnard College turned violent, prompting the Columbia affiliate to lock down campus.