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Detectives are continuing to question a 17-year-old boy after two young children were killed in a "suspicious" house fire in a Derbyshire town.A woman, 23, and her baby son escaped from a first floor window, but a girl, five, and a boy, two, died in the fire on Edale Way in Buxton on Friday.
The eight-month-old baby and mother, named locally as Fiona Adams, are being treated for severe burns in hospital.
Police said the teenager was arrested in the early hours of Saturday.
The mother is currently in a specialist burns unit at Wythenshawe Hospital in Manchester.
A hospital spokesperson said her condition was "comfortable and stable".
Earlier call-out
It is thought she jumped with the baby from a rear window on to a trampoline in the garden.
The baby has since been transferred to Royal Manchester Children's Hospital.
Derbyshire Fire and Rescue Service and Derbyshire Police are conducting a joint investigation into the fire, which is being treated as suspicious.
Assistant Chief Constable Steve Cotterill said the fire was being treated as suspicious because there was no apparent obvious accidental cause.
Police had previously been called to the house at 2245 BST on Friday after reports of noise and nuisance in the back garden.
Officers went and found that garden furniture had been disturbed but nothing else was found.
Mr Cotterill said because police had had contact with the family before the fire had begun, the incident had been referred to the Independent Police Complaints Commission.This article is from the BBC News website. ? British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.