A four-year-old boy and his father were badly burnt in a possible drug laboratory explosion that destroyed a house south of Perth yesterday.
Shocked neighbours heard a bang about 3.40pm at the home in Lilac Pass, Bertram.
Louise Zabori was in her kitchen next door with her three young children when she heard the blast, and then her neighbour calling for help.
"I thought someone had fallen out a window because there were bits of glass everywhere," she said.
"I called out 'are you OK?' and he said 'no'."
She brought her neighbour and his son into her house and put the boy in the bath.
The boy had burns to his face and arms and his hair was badly singed, she said.
The father had severe burns to his lower legs, arms and face.
"He was a little bit shocked, considering his injuries he must have been in pain but he was just worried about his little boy and making sure he was OK," Ms Zabori said.
They were brought out to the front of the house and kept cool with a hose until ambulances arrived.
The boy was taken to Princess Margaret Hospital and the 32-year-old father was taken to Royal Perth, where he was in a serious but stable condition last night.
A woman believed to be the child's mother arrived about half an hour after the blast.
Firefighters managed to bring the blaze, which wrecked the three-bedroom brick family home, under control within about 20 minutes.
Police said initially that the cause of the explosion was unclear.
But last night, WA Police said via Twitter that "improvised drug manufacture" was thought to be the cause.
Officers from the organised crime squad chemical operations team had been called in to "assess some items of interest found at the house", a police spokesman said.
Neighbours described the family as quiet but said the injured man was often seen going in and out of the house during the day.It is thought the family had been renting the house for about six months.