Firefighters were taken to hospital as they attempted to put out an inferno of flames which engulfed the roof of a Long Eaton school.
Teachers and staff at Harrington Junior School were evacuated after the fire broke out at about midday on Thursday, May 28.
Crews from Nottinghamshire, Derbyshire and Leicestershire fire services were called to the scene of the fire, which is currently still burning.
Incident Commander, Group Manager Dean Gazzard from Derbyshire Fire and Rescue Service explained the devastating situation from the frontline.
He said: "On arrival at the scene firefighters were faced with a well-developed fire in the roof of the building.
"Crews quickly got to work, surrounding the fire and have now brought the fire under control.
"Unfortunately two of our firefighters sustained minor injuries dealing with the fire and have been taken to hospital for treatment.
"We are continuing to work closely with partners including the head teacher of Harrington School, Erewash Borough Council, Emergency Planning, Public Health England and colleagues from Derbyshire Police to bring the incident to the safest and quickest conclusion and we expect to be at the scene well into the evening."
Six fire engines remain at the scene, supported by one aerial ladder platform, a water carrier, an incident command unit and a welfare unit to support crews on scene.
The fire service said the school was evacuated and everyone was accounted for. Local residents are being advised to keep windows and doors closed due to the smoke.
People are also reminded to keep away from the incident in line with current government advice to maintain social distancing.
A fire investigation into the cause of the fire will commence when it is safe to do so, but the cause is not yet known.
