Buchanhaven School was left closed on Monday (August 24) after a fire had left it damaged.
A group of youths were seen fleeing the scene.
Andrew Griffiths, head of primary education at the Peterhead school, explained that the fire wasn’t too destructive, but that a review of the building was needed to be undertaken.
He said: “A small fire took place yesterday (Sunday, August 23) evening at Buchanhaven School.
“On the advice of the Scottish Fire and Rescue Service it has been closed today (Monday) while the damage is fully assessed.
“Parents have been informed and it is expected that pupils and staff should be able to return tomorrow (Tuesday).”
The blaze took place at 8.20pm, and a group of youths were seen running from the scene at the time.
Shay Ewan, the station manager for Peterhead Fire Station, said that these types of fires are particularly dangerous as they needlessly divert firefighters.
He explained: “We were called out to a small, deliberate fire.
“Fires of this nature ties up operation crews, putting a local resource at risk.
“They also raise the risk of possible injury to the individuals involved.”
Mr Ewan also expressed that not only are wilful fires dangerous in and of themselves, but they also needlessly distract fire crews from potential disasters.
“These deliberate fires pose a particular danger to others should another fire genuinely start somewhere else,” he said.
It is thought, that due to the location of the fire, that the youths were on the roof.
The blaze was outside, and made up of “small combustible materials” such as paper.
Firefighter crews tackled the blaze hose reel jet.
If anyone witnessed anything suspicious in the vicinity of the school - on Hope Street, Peterhead -at the time then they should contact Police Scotland on 101 or Crimestoppers on 0800 555 111.