The revocations began last week and none of the CU students have been detained at this point, university spokeswoman Michele Ames said Wednesday morning.

Colorado State University said on Wednesday that an additional student had their visa revoked after several were revoked a day earlier. The Department of State acknowledged the move but won't say why they were revoked.

An immigration attorney told CPR News the students have the choice to either self-deport or stay and fight – but that leaves them open to being detained.