Who was responsible for the church fire in the book the outsiders?

In "The Outsiders," the church fire is caused by a group of children playing with matches, which is an accident rather than the result of intentional wrongdoing. However, Johnny Cade and Dally Winston are the ones who heroically rush in to save the children trapped inside the burning church. Johnny ultimately suffers severe injuries from the fire, highlighting the themes of sacrifice and bravery in the novel.