Police have arrested two people as investigations continue into a fatal crash in Sydney's south-west.
About 9.20pm on Friday (1 September 2023), emergency services were called to Sadleir Avenue, Heckenberg, following reports of a multi-vehicle crash.
A Mercedes and a Toyota Echo reportedly collided head-on, before the Mercedes hit a Toyota Rav4 and flipped on its side.
NSW Ambulance paramedics treated the driver of the Echo, a 24-year-old woman, and her 15-year-old male passenger; however, they both died at the scene.
The two occupants of the Rav4 were not injured, while the occupants of the Mercedes allegedly left the scene.
Officers from the Crash Investigation Unit commenced an investigation into the circumstances surrounding the incident.
During the course of the investigation, a 20-year-old man was charged and remains before the courts.
Following further inquiries, investigators arrested a 21-year-old man at a home in Liverpool about 9.30am today (Wednesday 6 September 2023).
A 22-year-old woman was arrested a short time later outside Liverpool Local Court.
Both have been taken to Liverpool Police Station to assist with inquiries.
Investigations are continuing.
Anyone with information about this incident is urged to contact Crime Stoppers: 1800 333 000 or https://nsw.crimestoppers.com.au. Information is treated in strict confidence. The public is reminded not to report information via NSW Police social media pages.