Overview
- Emergency calls about 10.40pm reported a brawl in the driveway of a home on Sedgman Crescent in Shalvey, in Sydney's west.
- Officers found a 17-year-old with multiple stab wounds, and paramedics took him to hospital in a critical condition.
- Riot squad and dog unit officers remained on scene to manage roughly 40 people who had attended the party.
- Police established a crime scene, reported no other injuries, and said no arrests have been made.
- Investigators said those involved are not believed to live at the property and urged anyone with information or dashcam footage to contact Mount Druitt Police or Crime Stoppers.