Police want the public's help in flushing out a fire bug who is at work in the Ashburton Domain.
Four fires in public toilets at the domain have been lit in the past couple of weeks and domain officials and police are concerned.
Ashburton District Council parks and recreation horticultural co-ordinator Rhonda Gallagher said domain staff worked hard to keep the domain and the town's public areas beautiful and it was disheartening when people had such destructive attitudes.
"We've had four fires in four toilets in three different blocks and we suspect it's the same person responsible for them all," she said.
The first fire was lit on the Thursday before Easter Weekend, April 5. The had been none since last week though.