Police officers in Castle Douglas are appealing for witnesses to deliberate fireraising at Castle Douglas High School.
The incident happened at around 10.45pm on Saturday 19 March.
Around that time two males were seen in the area of the boiler room at the school and shortly thereafter a fire was seen to have started on the doorstep of the building. On examination it appears that the boiler house was broken into and items taken out to start the fire. The two were seen to leave the area at around 11.45pm.
Constable Ian Dunn at Castle Douglas said: “The only description we have of the males is that they were wearing dark clothing and hooded jackets. It doesn’t need to be explained the absolute recklessness of such an act and should the fire have taken hold of the building then it could have been catastrophic. Anyone who may have any information which might help us catch those responsible is asked to call us on 101.”