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

Department of Homeland Security officials conducted the search as the Trump administration sought to deport a former student and pro-Palestinian activist.

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 Trump administration delivered an ultimatum to leaders of Columbia University: Make a series of major changes or lose out on billions in federal aid.

The Trump administration has delivered an extraordinary ultimatum to Columbia University, threatening to permanently end federal funding to the school unless it cedes control of an international studi