Derbyshire Constabulary has confirmed that a 15-year-old boy has died after he was found in a critical condition at a house in Wirksworth.
Police and ambulance were called to the house on Canterbury Terrace, in Wirksworth, on Thursday, July 31.
On arrival a 15-year-old boy was in a critical condition.
He was taken to Derby Royal Hospital where he later died.
Police said a cause of death is not yet known and the file has been referred to the coroner.