The Free State Department of Education suspects arson is the cause of the fire that burned down five classrooms at Refihletse Combined School in Verkeerdevlei.
Four classrooms were completely burnt down with the fifth one, a Grade R classroom, partially burnt.
Department spokesperson, Howard Ndaba, says another attempt to burn a classroom happened at the same school last month.
Ndaba says this is the only school in the area that caters for more than 500 learners.
Ndaba says the matter is under police investigation.