Students have had a total of 38 Leaving Cert results permanently withheld over suspected cheating.
Under exam rules, students can’t bring in mobile phones or notes into their tests.
The State Examinations Commission declined to say how many students were involved.
It also said that it wants to protect the pupils' privacy and will not reveal what subjects they were doing or where they were taking the exams.
According to The Irish Times, a further 34 results are being 'provisionally' held back while an investigation is carried out.