The bodies of a woman and two young children have been found dead at a house.
Officers in North Wales were alerted by concerned relatives and forced entry to the property in Trawsfynydd, Gwynedd, at around 8pm on Sunday.
A police spokeswoman said: “Inside the property police discovered the bodies of an adult and two young children.”
The dead woman, understood to be the mother of the two children, had lived in Trawsfynydd for about 18 months, moving from the nearby town of Blaenau Ffestiniog.
Neighbours said she lived with two boys, aged five and two, and the older boy attended primary school at Ysgol Edmwnd Prys.
Police were still at the house, on Chapel Street, conducting forensic examinations, residents said.
A woman, who did not want to be named, described the victims as a “happy and pleasant” young family.
She said: “I didn’t know her very well because she wasn’t from the village and I don’t think she had many family here. But you would see her in the street and she would always say hello. They were a very pleasant family and seemed very happy. It’s a terribly sad thing.”
Gwynedd councillor Thomas Griffith Ellis said: “The death of a mother and young children is a terrible thing but at Christmas it is even more shocking.”