Derbyshire Police say they have arrested a 34-year-old man and a 29-year-old woman in connection with a house fire which killed six children in Derby.
The fire broke out at a house in Victory Road on May 11 2012, killing Jade Philpott, 10, and her brothers John, nine, Jack, eight, Jesse, six, Jayden, five, and 13-year-old Duwayne.
Duwayne was pulled from the house by fire fighters but died in hospital two days later.
The children's parents, Mick Philpott, 55, and his 31-year-old wife Mairead, have been charged with all six murders and are due to go on trial next year.
Today 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. No further information will be released at this time."