Columbia University has disciplined pro-Palestinian students who occupied a building on campus, issuing sanctions ranging from suspensions to expulsions. The university stated that the return of suspended students will be overseen by the University Life Office. The announcement comes as a Syrian-born Columbia graduate, Mahmoud Khalil, remains in detention in Louisiana, raising questions about free speech on college campuses and the deportation process for US permanent residents. President Trump has accused pro-Palestinian activists of supporting Hamas and threatened to withdraw funding from schools that allow 'illegal protests'.