The State Department has ordered U.S. embassies to temporarily stop scheduling new student visa appointments, as the Trump administration works to expand social media screenings for applicants, the latest in a series of restrictions on international students.

In a cable dated Tuesday and obtained by CBS News, Secretary of State Marco Rubio instructed diplomatic posts not to add any more appointments for student and foreign exchange visas in preparation for the expanded vetting, and to take any unfilled appointments off their calendars. If students have already scheduled their visa interviews, those can still go forward.

The pause will last "until further guidance is issued" in the next few days.

The State Department is preparing for an "expansion of required social media screening and v

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