CONVICTED child-killer Mick Philpott is facing an investigation into claims that he raped two women.
Officers from Derbyshire Police in England are to interview Philpott in jail about the allegations.
Philpott and his wife Mairead were both jailed in April after being convicted of killing their six children by setting fire to their home in Derby.
In a statement, Derbyshire Police said: "We can confirm that officers from Derbyshire Constabulary are making inquiries into allegations of further offences committed by Mick Philpott.
"These allegations came to light during the investigation into the fire in May last year in which his children died.
"Investigations are continuing and it would be inappropriate to make any further comment at this time."
A police spokesman refused to give any further details, but one of the alleged victims is said to have told officers that Philpott raped her inside a caravan in his front garden.
It was reported that the second woman has alleged that Philpott assaulted her at a property in Derby in March 1996.
A source said: "The women will be formally interviewed, this time in connection with the rape allegations.
"Once those interviews are complete detectives will travel to Wakefield Prison and interview Philpott."
Philpott was jailed for life with a minimum term of 15 years after being convicted of six counts of manslaughter.
The trial heard that Philpott used petrol to set fire to his home in a bid to frame his mistress in a child custody battle.