A fire at a Londonderry primary school was started on the roof, police have confirmed.
The blaze at Holy Child Primary School in the Creggan area of the city broke out shortly before 9.30pm on Monday.
More than 20 firefighters in six appliances were called to the scene and managed to prevent the flames from spreading.
Damage was caused to scaffolding and building materials but pupils were able to attend as normal on Tuesday.
In a statement, the school described the fire as a "terrible incident" but said damage had been limited.
It said: "Holy Child stands by its motto 'Every Child, Every Chance, Every Day,' so we will continue to do what we do well."
Foyle MLA Mark H Durkan was at the scene on Monday night and said residents in the area were very angry.
Police Service of Northern Ireland Inspector David Anderson has appealed for any witnesses to contact officers at Strand Road police station on 101.