The comments come amid two more high-profile detentions by ICE of a Tufts University student and a University of Alabama student.

College officials worry the new approach will keep foreigners from wanting to study in the U.S. Students stripped of their entry visas are receiving orders from the Department of Homeland Security to leave the country immediately — a break from past practice that often permitted them to stay and complete their studies.

The Trump administration has revoked the visas of hundreds of foreign students. Tufts University is pushing back, a court declaration shows.

Once the Trump administration attempts to revoke a visa or green card – which grants permanent residency rather than a short-term stay in the US for a specific purpose -- students still have the right to an immigration hearing to determine if their deportations are justified, according to Cheryl David, a New York immigration attorney.

Department of Homeland Security revoked visas of 10 international students at Colorado universities, said officials at the universities - Anadolu Ajansı

Northwestern administrators cautioned international students, faculty and staff about potential travel risks as federal immigration policies tighten across the country. In an email sent to the university community Tuesday,