Police investigating a house fire in Derby which killed six children have been granted another 12 hours to question Mick Philpott and his wife Mairead.
Derbyshire Police confirmed they had been granted a 12-hour extension by a superintendent to continue questioning a 55-year-old man and a 31-year-old woman from Derby, whom they have not named, until 10pm tonight.
The couple were arrested in Derby city centre on Tuesday in connection with the blaze at their semi-detached house in Victory Road, Allenton on 11 May.
Mick Philpott comforts his wife after a press conference earlier this month
Five of their children - Jade, 10, John, nine, Jack, seven, Jessie, six, and Jayden, five - died in the fire, and a sixth - Duwayne, 13 - died of his injuries in Birmingham Children's Hospital two days later.
Detectives have confirmed that the seat of the fire was below the letterbox in the front door of the property and that petrol was thought to have been used as an accelerant.
Assistant Chief Constable Steve Cotterill has stressed that the investigation is still ongoing and will be a lengthy process.
After Tuesday's appeal for additional information, ACC Cotterill said a number of people have come forward and provided additional details that has "been extremely useful to the inquiry team."
In a statement on Wednesday he added: “It is now vital that other people do the right thing and talk to us if they know anything that would help us further.
“I appreciate that it will be difficult for some people but they should put their trust in us. My appeal is do not wait any longer – come forward now and do the right thing.”
Police have increased their presence on Victory Road since the arrests. The mobile police station will return to the area and there will be extra patrols. Forensic examinations are continuing at the house.
Mike Philpott, back centre, with his children, wife and mistress: the family has been in the media spotlight before.
Mick Philpott and his family have been in the media spotlight before.
He was dubbed "Shameless Mick" in 2007 after reportedly demanding a larger council house for his growing brood. In the same year Anne Widdecombe spent a week living with the then-unemployed 57-year-old as part of ITV programme Ann Widdecombe Versus The Benefit Culture.
Comments have been turned off due to legal restrictions. Full details here