Five teenagers have pleaded guilty to manslaughter over the fatal stabbing of Jack Westren at Shellharbour Junction railway station on the New South Wales South Coast.

The teenagers, who were aged between 13 and 15 at the time of the incident, entered guilty pleas in the Port Kembla Children's Court after being originally charged with murder. Prosecutors accepted the manslaughter pleas following negotiations, with the murder charges withdrawn for the five young offenders.

The court heard that Mr Westren, aged 25, was allegedly lured to the railway station after being contacted online. Prosecutors said one of the teenagers pretended to be a teenage girl and arranged a meeting with him before the alleged attack took place.

According to evidence presented during court proceedings, online messages and group chats were used to organise the meeting. Prosecutors alleged that the teenagers discussed confronting Mr Westren and that some participants were aware weapons could be involved.

Mr Westren, who had an acquired brain injury following a previous car accident, arrived at Shellharbour Junction station believing he was meeting someone he had been communicating with online. He was then confronted by a group of teenagers and attacked.

During the incident, Mr Westren suffered fatal stab wounds. Members of the public attempted to provide emergency assistance, including CPR, but he died at the scene.

The court heard the teenagers accepted responsibility for participating in a planned group assault that involved a significant risk of causing serious injury or death. The prosecution argued that their actions contributed to the circumstances that led to Mr Westren's death.

The case has attracted significant attention across New South Wales because of the ages of those involved and the alleged use of social media to organise the confrontation. It has also raised broader discussions about youth crime, online safety and the challenges faced by authorities in preventing serious offences involving young people.

While five teenagers have now pleaded guilty to manslaughter, the legal proceedings are continuing for other accused people. A 15-year-old boy remains before the Children's Court facing a murder charge, while another adult accused person is also continuing through the court process.

The victim's family and supporters have been following the proceedings closely as the justice process continues. The case has highlighted the devastating impact violent crime can have on families and communities.

Authorities continue to warn young people and families about the dangers of online interactions, including situations where social media platforms can be used to manipulate, organise harm or encourage risky behaviour.

The sentencing process for the teenagers who pleaded guilty will take place after further court proceedings are completed.