Work on the building was due to take place to enable children to use it
An investigation has been launched after a building within Arrasey Plantation was set alight.
Police believe it's a case of arson and happened over the past few days.
On social media, officers have described the situation as 'saddening'.
Anyone with information is asked to contact headquarters on 631 212.
Overnight sailings cancelled due to adverse weather
7:45pm Manxman crossing and its return have been called off
Rapist who 'terrorised' his victim told his sentence was 'entirely justified'
Fayle jailed for 18 years and 9 months
Complaints process for health system changed
Patients told to direct concerns to service used
Discovery of oiled birds 'makes a mockery of our biosphere status'
Manx Wild Bird Aid say it's a recurring problem in Peel
Charges now in place for those sending parcels to the EU
Changes have been introduced by EU rather than the IOMPO