Detectives are questioning a teenager after two young children died in a suspected arson attack on their home just an hour after their mother called police about anti-social behaviour.
Five-year-old Niamh and Cayden, two, died after becoming trapped as the fire ripped through the end-terrace house in Buxton, Derbyshire, on Friday night.
Their mother, named locally as 23-year-old Fiona Adams, escaped from the property with her eight-month-old baby Kiernan by jumping out of a bedroom window on to a trampoline in the garden.
She was said to be in a "comfortable and stable" condition in a specialist burns unit at Wythenshawe Hospital, Manchester.
The condition of the baby boy, who is at the Royal Manchester Children's Hospital, was not known.
Their father, named in reports as James Maynard, was at work at the time of the fire.
A 17-year-old youth was arrested in connection with the blaze, police said.
Assistant Chief Constable Steve Cotterill said police were called to the house in Edale Way around an hour before the fire broke out just before midnight.
He said Ms Adams called Derbyshire Constabulary's non-emergency number to report noise and nuisance in the garden.
Officers went to the house, spoke to her and searched the area, but nothing was found. Around an hour later emergency services were called to the property after the blaze broke out.
