The Ministry of Education has cancelled the results of four candidates who sat for the Kenya Certificate of Secondary Education in 2023.
Speaking while releasing the results at Moi Girls' High School in Eldoret, Machogu said their results were cancelled over impersonation.
"There were no irregularities reported during the exams but there were people who impersonated others," he said.
Machogu further noted that there were schools that were filling in candidates to meet the ministry requirement of 30 students to become an examination centre.
"I am concerned with the number that failed to sit the examination as it would point to a situation where some schools could be inflating the figures of registered candidates to meet the minimum threshold of 30 candidates," he said.
The CS additionally directed the relevant Directorate of Quality Assurance to work with the Kenya National Examinations Council to investigate the 3,685 candidates who failed to sit the 2023 KCSE Examination to unearth their true identity and whereabouts.
The Ministry has also announced that it has withheld the results of 4,109 candidates who were suspected to have engaged in examination irregularities.
"It is unfortunate that a few contracted professionals are still insistent on ruining the future of our learners by subjecting them to examination malpractices."
At least 903,260 candidates sat for the papers which began on October 23, 2023 and ended on November 2023.
Last year, Machogu announced that the Ministry of Education was exploring discontinuing the use of SMS service to check national examination results.
This was after errors were witnessed during the release of the 2023 Kenya Certificate of Primary Education exams.