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.

Neither university has identified the students who lost their visas, said what countries they are from, or revealed whether federal officials provided any explanation.

Ten international students have had their visas revoked by the U.S. Department of Homeland Security across Colorado universities. The University of Colorado released a statement confirming that F-1 visas issued to four international students on its Boulder and Colorado Springs campuses were revoked.