How a family saved a little boy trapped in a house fire that killed three others

A family and another man who saved a young boy from a Brisbane house fire, which killed two children and an adult, have been hailed as heroes.

The father of the family smashed a window to save the boy from the burning home after a suspicious fire tore through the Kingaroy house on Saturday afternoon.

Another man handed him a plank of wood in an attempt to get the boy out of the home.

Queensland Police Senior Sergeant David Tierney praised the group for saving the child's life.

The fire spread quickly. Source: 7 News
The fire spread quickly. Source: 7 News
This couple helped rescue the little boy. Photo: 7 News
This couple helped rescue the little boy. Photo: 7 News

"That was extremely brave what they did, from what I understand the house was truly alight - to do what they did was heroic," he told reporters on Sunday.

Rescuer, Zac Hairon, who was driving by at the time, told 7 News he broke the window and yelled out to anyone to come towards him if they could see him. He said the four-year-old survivor was distraught.

"He was crying and gasping for air," he said.

LNP leader Deb Frecklington also thanked the men.

"I'd like to thank and congratulate those honorable, courageous people who stopped and saved the life of that precious little boy, they are real heroes," she said.

Neighbour of the family Ron Godier said the mother came running out screaming "My baby! My baby!".

Rescuer, Zac Hairon, who was driving by at the time, told 7 News he broke the window. Photo: 7 News
Rescuer, Zac Hairon, who was driving by at the time, told 7 News he broke the window. Photo: 7 News
A man and two children sadly died. Source: 7 News
A man and two children sadly died. Source: 7 News

"I just feel so broken for them," he said.

The boy's mother remains in hospital under observation due to shock and he has since been released to family.

A 47-year-old man, two-year-old child and an 11-month-old baby died in the fire.

Queensland Police said it will still be some days before they determine what caused the blaze.