International Harvard students say they are experiencing “pure panic” amid the Trump administration’s move to bar foreign enrollment, as students from around the world told CNN they are coming to grips with the possibility of revoked visas,

Harvard sued and asked for a restraining order less than 24 hours after the Trump administration had said it would block current and future international students from attending the university.

Harvard University sued the Trump administration on Friday over its decision to revoke the Ivy League school's ability to enroll foreign students, ratcheting up White House efforts to conform practices in academia to President Donald Trump's policies.