Vandals set fire to a tree in a public park in York.
Firefighters were called to the park in the Woodlea Avenue area of the city at about 9.30pm on Saturday.
Crews found a tree stump had been set alight.
They used a knapsack sprayer to extinguish the flames.
A spokesman for North Yorkshire Fire and Rescue Service said: "The cause is believed to be deliberate by youths."