Police have arrested five teachers in Kuria West over an alleged Kenya Certificate of Secondary Education malpractice.
Police said 30 mobiles were confiscated after the arrest.
On Monday, police arrested six Telegram group administrators suspected of being involved in the ongoing KCSE malpractices.
Police launched a multi-agency operation including CAK officers and DCI officers attached to the Kenya National Examinations Council and all telecommunication service providers.
The KNEC monitoring team identified over 32 social media platforms being used to share, sell and post examination materials in violation of the KNEC Act and regulations.
Knec said it is working to ensure there will be no cases of malpractice in the 2023 national exams.
Form Four candidates across the country sat their theory papers for the 2023 Kenya Certificate of Secondary Education on Monday, November 6.
On Tuesday, candidates sat for Maths Paper 1 and English Paper 2.
On November 8, candidates sat for Chemistry Paper 2 and English Paper 3.
On Thursday, November 9 the learners will be tested in Kiswahili Lugha Paper 2 and Kiswahili Insha Paper 1.
For the entire Friday, the candidates will do their Chemistry practicals.
The exams started on October 23 with practical papers and will run for a whole month till the end of November.
Basic Education Principal Secretary Belio Kipsang called on everyone involved in the administration of national exams to uphold integrity.
Belio spoke on Monday at the Westland Sub-County containers where centre managers were picking papers for session one.
"The amount of investments we are putting into protecting the integrity of our examination should not be this high. We need to build trust as Kenyan people. This trust deficit is killing all of us. As a country we should not continue this way" the PS said.
"We are here at 6 am because we want to police ourselves. It is not right. We should be able to leave our children be children."