Police have released images of three people they wish to speak with after investigating a fatal crash at Albion Park Rail in the early hours of Saturday morning.
Two of them are on outstanding warrants for murder.
About 2.20am a Ford Territory was travelling south on the Princes Highway, when it struck the rear of a petrol tanker, which was turning out of Creole street.
Daniel Merrett, 27, was a passenger in the Ford and died at the scene. His 25-year-old sister was driving the car and airlifted to St George Hospital where she remains in a stable condition.
Her two passengers, a man and woman, both aged 25, were hospitalised and are also now in a stable condition.
Initial investigations by Lake Illawarra Police District officers suggest the Ford was being pursued by another vehicle at the time, a silver Toyota Corolla.
Three people wish to speak with are Andrew Russell, 34, and Darren Butler, 27, who both have outstanding warrants for murder in relation to the incident; and Holly Green, 25.
The public are urged not to approach them.
Officers have also released an image of vehicles similar to those involved in the incident.
Anyone who saw anything on the night, or anyone with dashcam footage, is asked to come forward and contact police.
As part of the investigation, officers stopped a vehicle on Five Islands Road, Port Kembla, about 12.15pm on Tuesday, however no arrests were made.
Anyone with information about is urged to contact Crime Stoppers: 1800 333 000.