Confirming the tragedy, National Police Service Spokesperson Dr Resilia Onyango said 14 other pupils with serious burns have been rushed to hospital.
The deceased students were burnt beyond recognition in the Thursday night inferno.
The cause of the fire is yet to be established.
Meanwhile, a team of police officers led by Deputy Director of CID John Onyango and Director of Homicide Martin Nyuguto has been deployed to the school to commence investigations into the incident.
In his message, President Ruto promised swift action and urged relevant authorities to investigate the incident to bring those responsible to book.
“Our thoughts are with the families of the children who have lost their lives in the fire tragedy at the Hillside Endarasha Academy in Nyeri County. This is devastating news. We pray for speedy recovery to the survivors,” the president said.
