A man and a woman from Derby have been arrested in connection with the Derby house fire that killed six children, police said on Thursday.
Derbyshire police said a man, 34, and a woman, 29, both from Derby, had been detained in relation to the fire in Victory Road which killed Jade Philpott, 10, and her brothers John, nine, Jack, eight, Jesse, six, Jayden, five, and 13-year-old Duwayne.
The children's parents, Mick, 55, and Mairead, 31, have already been charged with the murder of the six children and face trial next year.
Assistant Chief Constable Steve Cotterill said: "These latest arrests are part of the ongoing investigation into the circumstances surrounding the fire.
"Despite the fact that two people have already been charged with murder, we are continuing our investigation to ensure that all lines of inquiry are completed.
Anyone who has any information about the fire should ring the police on 101 or call Crimestoppers on 0800 555 111.