The U.S. Justice Department is investigating whether Columbia University concealed “illegal aliens” on its campus, one of its top officials said Friday, as the Trump administration intensified its campaign to deport foreigners who participated in pro-Palestinian demonstrations at the school last year.

The US Justice Department is investigating Columbia University for allegedly concealing 'illegal aliens' on its campus, as part of the Trump administration's campaign against those involved in pro-Palestinian demonstrations.

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 Ivy League school unless it cedes control of an international studies department and implements sweeping changes to other campus policies.

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