The White House complained that Columbia University is refusing to help federal agents find people being sought as part of the government’s effort to deport participants in pro-Palestinian demonstrations.

Mahmoud Khalil, a 29-year-old legal resident of the United States, was arrested and detained by federal agents Sunday, after his green card was revoked by the Trump administration.

Dozens of University of Chicago students and faculty members rallied on Tuesday in support of a former Columbia University student and pro-Palestinian activist Mahmoud Khalil, who was arrested by federal immigration authorities over the weekend in New York.