Irregularities that are sanctioned by Knec include carrying unauthorised materials, collusion and engaging in various forms of cheating.
At Nyabisase SDA Mixed School, 285 students have been affected and only 32 have their results.
At least 380 students who sat the Kenya Certificate of Secondary Education (KCSE) exam in Kisii County have had their results cancelled due to irregularities with many of the cases linked to cheating.
County Education Board chairman Prof Henry Onderi said the students have Ys in their results, which denotes that the candidate was involved in an exam irregularity.
