Police say they are looking for a group of youths in connection with a deliberate fire at a former school in Dyce.
Emergency services were called to Cordyce School on Riverview Drive at around 9.50pm on Friday.
The same building was damaged by a blaze back in 2017.
Detective Constable Stuart Hache, of Aberdeen CID, said: "Thankfully no one has been injured as a result of the fire, however we are now treating the fire as wilful.
"We are still appealing for anyone who has information and are especially keen to speak to a group of youths who were seen in the vicinity at the time of the outbreak of fire."
Anyone who has information can call 101, quoting incident number 4348 of July 31. Alternatively calls can be made anonymously via Crimestoppers on 0800 555111.