A toilet block beside community tennis courts in Keith was set on fire at the weekend.
At around 4pm, a blaze was lit in the facility, which is part of the pavilion in the town’s St Rufus Park.
Police are treating it as a deliberate fire.
It is believed there were a number of people in the area at the time, and officers have asked for any witnesses to come forward to help with their inquiries.
Constable Carla Breen said: “I’m appealing to anyone with information that may assist the investigation to contact Keith Police Office through 101 quoting reference 2350 of January 23.”
Toilet blocks set on fire beside community tennis courts in Keith