A second boy has died following a house fire in Penistone.
Jack Sykes was left critically ill following the blaze, in Tennyson Close, on Wednesday October 22.
His father, Darren, aged 44, and his nine-year-old brother Paul both died in the fire.
Detectives investigating the fire have confirmed it was started deliberately, with several seats of the fire inside the property. An accelerant was used.
Police are not looking for anyone else in connection with the incident.
Police have ordered further tests to try to establish the cause of death of Paul but say the cause of Darren’s death “was compatible with the effects of the fire.”
An investigation is continuing.