South Australian police are investigating a suspected arson attack after four government vehicles were destroyed by fire in the staff car park at Yatala Labour Prison in Adelaide’s northern suburbs. Emergency services were called to the prison car park on Peter Brown Drive at Northfield at about 4 am on Tuesday, 13 October. Police described the circumstances as suspicious, and the fire is being treated as a possible deliberate attack. The vehicles destroyed were two Mitsubishi station wagons and two Toyota sedans.

The incident has raised renewed concerns about security at the prison, with the Public Service Association (PSA), which represents correctional staff, calling for urgent improvements to protect employees and government property.

PSA South Australian vice-president Craig Bates said staff were outraged by the destruction of the vehicles and argued that the car park was insufficiently secured. The union also reported that two employees arriving for work had encountered a person wearing a balaclava, who then fled. Police are investigating the fire, and the available reporting does not establish whether that person was responsible for the incident.

The union said it had raised concerns about the car park’s security several months before the fire. In May, it wrote to the Department for Correctional Services seeking measures including an extension of the perimeter fence and protective security officers on duty around the clock. According to the union, those requests were rejected.

The association also referred to an earlier incident in which a stolen vehicle was driven through the car park and people wearing masks were reportedly involved. The union said there had been other instances of vehicles being damaged, adding to concerns about access to the area and the safety of employees arriving for or leaving their shifts.

Department for Correctional Services chief executive David Brown confirmed that the incident was being treated seriously and said CCTV footage existed. He declined to discuss the details of the footage while the police investigation remained active.

Brown said he had met with site management after the fire and that the department was considering ways to improve staff safety. Options under consideration include restricting access to the car park and installing fencing or other barriers. He noted, however, that Yatala Labour Prison is a large facility with extensive areas that interface with the public, making security planning a broader operational issue.

Police have asked anyone who witnessed suspicious activity in the area or has relevant dashcam footage to contact Crime Stoppers. Investigators will need to establish how the fire began, identify any people involved and determine whether the incident is connected to previous security concerns. The destruction of the four vehicles has prompted fresh scrutiny of the arrangements protecting prison employees and government assets. However, no offender has been confirmed publicly, and the suspected arson remains under investigation.