A man was found injured inside the house
Five people have been arrested over the death of a youth in an incident at a house in Nottingham.
Police were called to Heathfield Road, in Old Basford, at about 1400 GMT on Friday after reports of a disturbance.
A 17-year-old found stabbed at the scene was taken to the Queen's Medical Centre but later pronounced dead.
Two men in their early 20s and three male youths have been arrested. A post-mortem examination revealed the victim died from a stab wound.
Heathfield Road remains closed while forensic experts continue to examine the scene.
Door-to-door inquiries are being carried out and officers will examine CCTV footage.
A police spokesman said extra patrols would be carried out in the area in an effort to reassure members of the public.
A post-mortem examination revealed the victim died from a stab wound.
The dead man is understood to have been formally identified by his family and is expected to be named by police on Sunday.
A police spokesman said: "In an effort to establish the circumstances which led up to this death, we would ask anyone who was in and around Heathfield Road at 2pm on 13 March to cast their minds back to see if they can remember anyone acting suspiciously."