A 16-year-old boy has been fatally stabbed at a gathering at a friend's western Sydney home.
Emergency services were called to a house at Ropes Crossing, near Blacktown, early on Saturday morning to find the boy suffering a stab wound.
Police performed CPR before paramedics arrived but the boy died at the scene.
Detectives from Mt Druitt Police Area Command are now investigating, assisted by the state's homicide investigation squad.
No arrests have been made but officers are speaking with a number of witnesses.
The family of the dead boy arrived at the scene shortly after the incident and were assisted by police. He is yet to be formally identified.
Investigators said there was no evidence to suggest the stabbing was gang related or connected to any other incidents.
The boy was at the house with friends before the stabbing occurred but police said the fatal incident was not the result of someone gatecrashing the gathering.
Anyone with information is urged to contact Mt Druitt Police or Crime Stoppers on 1800 333 000.
