Scoil Mhuire Gan Smal in Letterkenny will reopen again tomorrow after it was forced to close today because of a fire.
The school was forced to close this morning because of a fire which started outside the building.
Materials being used in a the ongoing construction project at the school were set alight.
Meanwhile, Gaelscoil Adhamnan was also attacked over the weekend in Letterkenny.
On Saturday several items were stolen including a laptop and projector.
Mayor Cllr Gerry McMonagle has condemned both attacks......