DHS agents search Columbia dorm rooms after Khalil arrest

Department of Homeland Security agents searched two dorm rooms at Columbia University on Thursday night, the school said, a move that comes less than a week after the federal arrest of former grad student Mahmoud Khalil.“I am writing heartbroken to inform you that we had federal agents from the Department of Homeland Security (DHS) in two University residences tonight,” interim Columbia President Katrina Armstrong said in a statement to the school.“No one was arrested or detain