Between classes, when throngs of students stream into and out of Columbia University ’s campus, the security lines can back up like a TSA checkpoint. There’s a switch-back path of metal fencing that leads into a white tent, where two sets of guards check and then swipe campus ID cards before letting students in and out.

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.

The Department of State revoked the visa of a Columbia University student, while federal immigration officials arrested a Palestinian protester for overstaying an expired student visa, the Trump

Agents with the Department of Homeland Security searched two university residences with a warrant Thursday evening. No one was arrested and it was unclear whom the authorities were searching for.

The Department of Homeland Security arrested a second student involved in the protests at Columbia University.

A Palestinian woman was arrested in New Jersey, while another activist from India chose to "self-deport", US officials say.

A top U.S. Justice Department official says the department is investigating whether Columbia University concealed “illegal aliens” on its campus.