Dozens of anti-Israel protesters broke into an academic building at Columbia University and took it over early Tuesday morning – hours after the school began suspending students who refused to vacate their encampment.

Footage posted on social media shows numerous protesters milling about inside Hamilton Hall and placing wooden chairs and tables in front of the doors in apparent attempt to block others from entering.

A photo published by the Columbia Daily Spectator, the student newspaper, shows a masked protester reaching through broken windows to zip-tie the doors shut.

“Hey hey, ho ho, the occupation has got to go,” protesters outside the academic building can be heard chanting during the wild scene, according to footage posted to X by an independent news blog.