The boyfriend of a teenage mother who died in a blaze which claimed the lives of three generations of one family is being held by police.
Kim Buckley, 46, daughter Kayleigh, 17, and six-month-old Kimberley all died when fire ripped through their home.
Up to 30 firefighters attended the fierce blaze at 15 Tillsland, Coed Eva, Cwmbran, south Wales.
Kayleigh had recently given birth to twin daughters and was still coming to terms with the tragedy of losing one shortly after birth.
Carl Mills, 27, the father of the twins, was named locally as the boyfriend arrested by police on suspicion of murder.
He is known to have had a stormy relationship with grandmother Kim Buckley who was against her daughter's seeing him from the outset.
One neighbour claimed he threatened to kill her during a heated argument several weeks before the fire.
Mrs Buckley had told neighbours that she "hated" him.
Police said they had arrested a 27-year-old man, from the Manchester area, on suspicion of murder.
Officers had also been called to the family's three bedroom home on a number occasions in the past.