Columbia University says it has expelled or suspended some students who took over a campus building during pro-Palestinian protests last spring and temporarily revoked the diplomas of some students who have since graduated.

Federal agents searched two student residences at Columbia University, its interim president said, a week after immigration agents detained Mahmoud Khalil, a leader of last year's campus protests, who the Trump administration wants to deport.

Department of Homeland Security agents had judicial warrants to conduct the searches, according to Columbia’s interim president.

Columbia Interim President Katrina Armstrong said Thursday that the agents had search warrants and no one was arrested or detained in the student resident search.