Firefighters have compared leaving lighters near children to "giving them a loaded gun" after a blaze started by a toddler left an Opotoki man with severe burns on the weekend.
The 34-year-old man suffered serious burns to his arms in a fire at an Opotiki property on Saturday morning.
It was started by a three-year-old boy playing with a lighter, firefighters said.
Fire Service national investigations manager Peter Wilding said the blaze was the latest in a series of serious fires started by children under five years old.
Children were also behind fires that gutted homes in Timaru, Tokoroa and Wairaki over the last three months, he said.