Three teenagers have been arrested after a man was allegedly stabbed while trying to stop a group of boys from breaking into a car in Melbourne’s south-east early on Saturday morning.

Police said the incident happened in Langwarrin, in Melbourne’s south-east, after a group of boys allegedly attempted to steal a vehicle. A man confronted the group, and police allege that he was stabbed during the confrontation.

Emergency services were called to the area following the incident. The injured man was taken to hospital with serious injuries and remained in a critical condition. Police subsequently arrested three teenagers in connection with the alleged attack.

The arrests followed an investigation involving local police, who examined the circumstances surrounding the alleged attempted car theft and the confrontation that followed. Investigators have also obtained CCTV footage from the area as part of their inquiries.

The incident has raised concerns about the risks faced by residents who confront people suspected of stealing vehicles or breaking into properties. Police generally encourage members of the public to avoid physically confronting suspected offenders and instead contact emergency services when a crime is taking place.

According to police, two of the teenagers arrested were 16 years old. The investigation is continuing as detectives work to establish exactly what happened before, during and after the alleged stabbing.

The incident occurred amid ongoing attention on vehicle-related crime across Victoria. Police investigations into alleged car thefts can involve CCTV footage, witness accounts, forensic evidence and information gathered from nearby properties.

For residents in Melbourne’s south-eastern suburbs, incidents involving attempted vehicle theft can have a significant impact because cars are often targeted from residential driveways and streets during overnight or early-morning hours. Authorities have repeatedly encouraged residents to secure vehicles, remove valuables and report suspicious activity rather than putting themselves at risk.

The latest case remains before the legal process, and the allegations against the arrested teenagers have not been proven in court. Police will continue investigating the circumstances surrounding the alleged attack and any other offences that may be connected to the incident.

The injured man’s condition is a major focus following the alleged stabbing, while investigators are expected to examine the events leading to the confrontation and the actions of each person involved.

Police have asked anyone with relevant information or footage from the area to come forward as the investigation continues. Further details about charges and court proceedings are expected as the case progresses.