South Australian authorities are investigating a series of alarming acts of vandalism after four Stobie poles were deliberately cut through in Adelaide's northern suburbs, leaving live electrical infrastructure exposed and creating what SA Power Networks has described as an extreme risk to public safety. The incidents occurred during May and June and have prompted urgent warnings for residents to stay well away from damaged power infrastructure and report any suspicious activity.
According to SA Power Networks, the vandals used heavy-duty equipment, including what is believed to be angle grinders, to cut through the steel-and-concrete bases of the Stobie poles. Three of the poles collapsed completely, while another was left dangerously unstable. One of the most concerning incidents occurred in Cobbler Creek Recreation Park, a popular destination for walkers, cyclists and families, where damaged power infrastructure left high-voltage wires exposed near public recreation areas. The park was temporarily closed while emergency crews secured the site and completed repairs.
A separate incident took place on Harris Road at Concordia, near Gawler, where a Stobie pole was cut down and a pole-top transformer was stripped, leaving high-voltage electrical equipment scattered on the ground. While investigators believe copper theft may have been a motive in that case, SA Power Networks said the motivation behind the remaining attacks remains unclear because little or no valuable metal was removed.
SA Power Networks External Affairs Manager Cecilia Schultz described the attacks as unprecedented, reckless and potentially fatal. She warned that people do not need to touch exposed power lines to be electrocuted, as high-voltage electricity can arc across short distances. Residents have been reminded to remain at least 10 metres away from any fallen or damaged powerlines or leaning poles and to immediately contact SA Power Networks or emergency services if they discover damaged electrical infrastructure.
Authorities believe the incidents may be linked because of their similar method and timing. Police and SA Power Networks are appealing for anyone who was in the affected areas during the relevant dates to review dashcam or mobile phone footage for suspicious vehicles or individuals. Crime Stoppers is also seeking information that may help identify those responsible.
The vandalism has raised wider concerns about attacks on critical infrastructure and the potential consequences for public safety. Stobie poles are unique to South Australia and are specifically designed for durability, meaning cutting through them requires significant planning, specialist equipment and considerable effort. Officials say the deliberate nature of the damage demonstrates a serious disregard for community safety and could easily have resulted in fatal consequences for unsuspecting members of the public.
Investigations remain ongoing, and authorities are urging anyone with information to come forward. SA Power Networks has emphasised that protecting critical infrastructure is a shared community responsibility and that reporting suspicious behaviour promptly can help prevent future incidents and potentially save lives.
