Four young children have died in a house fire, police said.
Emergency services were called to a house in Hulland Ward, near Ashbourne, Derbyshire, at 11.30pm on Monday.
Derbyshire Police said that when the blaze at the house in Highfield Road was extinguished, four children were found to have died.
A spokesman said: “Four young children, two girls and two boys, have died.”
He said there was also “significant damage” to the house.
“There is currently a joint investigation ongoing between Derbyshire Constabulary and Derbyshire Fire Service to establish the cause of the fire, which at this time is still unknown.”
Derbyshire Fire and Rescue service said it was called to the “severe house fire” at a semi-detached house in Highfield Road at around 11.30pm.
A spokeswoman said four fire engines attended the scene, adding: “The fire was well developed on arrival.”
A Derbyshire Police spokesman said the boys who died were aged nine and four, and the girls were six and two.
He said: “A 45-year-old woman was taken to the Royal Derby Hospital suffering from smoke inhalation. At this stage there is no obvious sign of what caused the fire and a joint investigation between Derbyshire Constabulary and Derbyshire Fire and Rescue Service will get under way later this morning.”