A police officer fired his gun inside Columbia University's Hamilton Hall while clearing pro-Palestinian protesters barricaded inside. No injuries were reported, and the district attorney's office is reviewing the incident. The protesters had been occupying the hall for over 20 hours. The incident is part of a wave of protests across US college campuses against the Israel-Hamas conflict. In Los Angeles, over 200 people were arrested after police clashed with protesters at UCLA, leading to a chaotic scene.