A fire on Wednesday razed a dormitory at Meru School in North Imenti constituency in a suspected arson attack.
The cause of the fire is yet to be established but some quarters suggested it was sparked by an electric fault.
First responders from the Kenya Red Cross said no one was injured following the incident.
Nothing was salvaged from the affected dormitory after the county's fire brigade put off the flames.
The fire started as the boys were attending their evening classes. Journalists were blocked from entering the school.
There were also claims the fire was in protests to policies by the school's new principal, high-handedness, and poor diet.
Some locals, however, said they read malice in the frequent unrest at the national school.
Karani Mutonga, who responded to the incident, blamed the lack of discipline and mentorship for the boys.
Two weeks ago, five students of a Meru school were charged with setting a dormitory ablaze on September 1.
The five denied the charge before senior principal magistrate Monica Maroro and were released on Sh500,000 bail or Sh1 million bond each.
They were among 13 others who were expected to take a plea after the court ordered them to be detained at Meru police station.
The case will be mentioned on September 20 and hearing on September 25.