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

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.

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.

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.

Columbia University announced Thursday that multiple students involved in a pro-Palestinian building occupation protest last year have been expelled or suspended.

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

The Department of Homeland Security said a Columbia University student who had her student visa revoked self-deported. Another Palestinian student was arrested for overstaying her expired visa.

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.