Two people have been arrested on suspicion of murder by police investigating a house fire in which a woman and two children died.
A 20-year-old woman, a boy aged four and a two-year-old girl were pronounced dead by firefighters after the blaze broke out at a property in Maes Y Groes, Prestatyn, on Friday night, a North Wales Police spokeswoman said.
The woman has been named locally as Lee-Anna Shiers.
The 15 month old baby boy is said to be in a critical condition. He is the son of Ms Shiers and her 23 year old partner - believed to be Liam Timbrell - who is receiving treatment for 'serious' injuries.
Ms Shiers is believed to be the aunt of the two children who died.
The two people in custody following last night’s fire in Prestatyn are a 45 year old man and a 42 year old woman.
Neighbours have paid tribute to Lee-Anna Shiers.
She and Mr Timbrell were described as "the nicest... kindest... sweetest people".
"You don't expect this in Prestatyn", one man added.
A joint investigation is being carried out by North Wales Fire and Rescue Service and North Wales Police.
A Welsh Ambulance Services spokeswoman said Mr Timbrell and baby were taken to Glan Clwyd Hospital.
The man was later transferred to Whiston Hospital, Merseyside, while the baby was moved to Alder Hey Children's Hospital in Liverpool.