More than ten fires were set over the course of Wednesday afternoon in west Fife.
Police were first called to Benarty Hill after a member of the public reported a blaze at 2.30pm.
A number of other fires were started within Lochore Meadows.
Police said groups of youths setting fires continued into the evening, with another set near to St Margaret’s Marsh beside North Queensferry.
The Scottish Fire and Rescue Service attended to deal with a fire in gorse bushes in the area.
A Cowdenbeath Police spokesperson said: “Wildfires can spread quickly, threaten local wildlife and take up fire service time and resources.
“Officers have been at Benarty Hill and Lochore Meadows assisting
[the Scottish Fire and Rescue Service] to contend with numerous incidents of willful fireraising.
“Over ten separate fires have been raised this afternoon. The first was reported by a member of the public at 2.30pm on Benarty Hill. Other seats of fire were then raised within Lochore Meadows.”