Seven-year-old Ola Lemboye, yelled "Mummy! Mummy" as his mother Kuburat desperately tried to save her children from a fire that had broken out at the family's home in Brompton Terrace, Beeston, Leeds.

But after carrying sixth-month- old Jumi to safety, Mrs Lemboye was beaten back by the deadly fumes and could not save Ola.

Firefighters later found him lying on the bed where he died after being overcome by smoke.

Wakefield Coroner's Court heard yesterday that Ola's mum had been downstairs after putting her three children to bed in the attic bedroom of the family's rented home.

At around 10pm her eldest son Joshua, who was eight at the time, ran downstairs shouting "Fire! Fire! Fire!" as a fire alarm on the first floor of the house began to sound.

Mrs Lemboye ran to the second floor bedroom and began a desperate search for Ola and his sister who were still inside.

Finding the baby in the smoke-clogged room, she carried on looking for Ola, who the court heard was shouting "Mummy! Mummy!" during her rescue effort.

After taking the baby downstairs, Mrs Lemboye returned to the bedroom but was still unable to find her son because of the smoke and was beaten back.

The inquest heard that she ran downstairs again and rang emergency services then hurried to a friend's house nearby for help.

Ola's father Abiodun Lemboye, a trained nurse, had gone to work earlier that evening.

Firefighters arrived and made their way into the house. They found Ola dead on a bed in the attic bedroom on October 27 last year.

A post mortem report carried out later found that he had died from smoke inhalation but had not suffered any burns.

Fire investigators said an electric fan heater, which the court heard Ola would sometimes turn on at night, had caused the blaze.

Duncan Stainthorpe, who was a fire investigator at the time, said: "The fan heater was the ignition source and it is most likely that it set fire to bedding or other textiles in the bedroom.

"The fire then spread to the bed where Ola was asleep."

He said that although the smoke detector on the first floor had gone off, the one outside the children's bedroom had been removed from its base plate.

Assistant coroner Melanie Williamson recorded an open verdict.

She said: "It is possible that Ola's duvet went over the heater, thereby causing the fire."