A mother had to be held back by neighbours as she fought to get back into the burning house she had just escaped from to save her nine-year-old son.
Sheree McGill (34) has been left "inconsolable" over the death of her son Evan after the fire at their home early yesterday.
Her two daughters Yasmin (4) and Nya (3) were rescued by firefighters and taken to hospital where they are said to be in a stable condition.
Fire crews were called to the terraced property in Altonhill Avenue, Kilmarnock, Ayrshire, at around 3.20am yesterday.
They rescued the three children on the upper floor after fighting through "intense heat and thick, acrid smoke" to reach them.
The youngsters were taken to Crosshouse Hospital in Kilmarnock where the boy, named by family members as Evan Mohammed, died.
His mother and the rest of the family were being comforted at their grandmother's house nearby. Ms McGill's sister, 31-year-old Lyndsay McGill, said Evan's older sister Talia (15) had managed to escape from the burning building by putting a blanket over her head.
She said the whole family were in "utter shock".
She said: "We just can't believe it. I've got children around the same age and they're all friends. My sister is inconsolable. She doesn't know what to do.
"We think the fire started in Evan's room. We think it was an electrical fault.He had a fibre-optic Christmas tree in there.
"My sister's bedroom is downstairs, so she got out quickly. Sheree tried to get back in when she realised that her kids were still in there but some of the neighbours held her back."
It is understood the children's father Saleem Mohammed no longer lives in the family home.
Strathclyde Fire and Rescue's specialist fire investigation team will carry out a joint inquiry with Strathclyde Police to determine the cause of the fire.
Police said the blaze is not being treated as suspicious. Wilson Brown, Strathclyde Police area commander for East Ayrshire, said: "We will be carrying out a detailed examination of the house."