These include about 640 candidates out of 1.7million that did not do biometric verification.
According to him, some of these hitches were caused by some CBT owners and cyber cafe operators.
He said the candidates will be made to write the examination under his own very eyes.
He mentioned that in subsequent exams, the board will introduce electronic jammers to further reduce cases of malpractice.
He finally advised candidates to forward all complaints to designated JAMB CBT centres.