HAVANA (AP) — Eight people are under arrest in connection with a scandal involving the illicit sale of university entrance exams, Cuban authorities said Monday after thousands of high school students were forced to retake the test.

The unnamed suspects include five teachers, a methodologist, an employee at the Ministry of Higher Education’s printer’s office and a person not linked to the education sector. There was no word on possible criminal charges, but prosecutors were collecting evidence to present to the courts.