Derbyshire Police have arrested a 45-year-old man in connection with a house fire in Derby which resulted in the death of six children.
Mick Philpott, 55, and his wife Mairead, 31, have already been charged with six counts of murder over the fire, in which their children, all aged 13 and under, were killed.
Jade, 10, John, nine, Jack, eight, Jessie, six and five-year-old Jayden died in the fire, while their older brother Duwayne died in hospital only days later.
Derbyshire Police confirmed that they are investigating another property in Derby.
The Philpotts will face trial next January.
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