- 12 updates
Detective Superintendent Rob Vinson said he was seeking to speak to a teenage boy and young girl who were seen throwing a laptop bag away near the family home.
Officers originally said they suspected the fire was an arson attack but later claimed no accelerant had been found at the scene.
Police have confirmed scientists had found no evidence of a flammable liquid being used.
Latest ITV News reports
Police investigating the Harlow house fire in which a man lost his wife and five children think the home may have been burgled beforehand.