DHS agents search two Columbia University residences - days after anti-Israel protester Mahmoud Khalil arrested by ICE at off-campus apartment | 14 March 2025 | Department of Homeland Security agents executed search warrants on two Columbia University residences on Thursday night -- just days after anti-Israel protester Mahmoud Khalil was arrested by ICE at an off-campus apartment, the Ivy League school announced. Interim President Katrina Armstrong revealed the raids in a letter to the Columbia community and noted that nobody was arrested or detained when the feds searched the rooms of two students. "Federal agents from the DHS served Columbia University with two judicial search warrants signed by a federal magistrate judge authorizing DHS to enter non-public areas of the University and conduct searches of two student rooms," Armstrong said.