An increasing number of student deportation threats involve the revocation of visas based on relatively minor offenses like years-old misdemeanors, according to immigration attorneys, or sometimes no reason at all.

Colleges say the cancellations have caused fear and confusion on campuses across the U.S.

The Trump administration has revoked hundreds of international student visas nationwide, including those attending colleges and universities in California. Universities have reported some students being forced to leave immediately,