Acomb crews were called to two separate fires at a play park last night (Wednesday).
They were first called to reports of a bin on fire at 7.19pm.
A North Yorkshire Fire & Rescue Service spokesperson said: “They extinguished the bin using a bucket of water and backpack sprayers.
“The cause is believed deliberate.”
They were called back to the park 20 minutes later.
The spokesperson said: “Acomb’s second appliance returned to the scene of their previous incident after another fire had been started in the bushes and under growth of the play park.
“Police were requested to also attend the scene after the cause is believed deliberate.”