Two teenagers have been arrested in Adelaide following a police investigation into alleged dangerous behaviour involving high-powered electric motorbikes and incidents targeting motorists in the southern suburbs.

South Australia Police said officers conducted a search at a Hove property on Tuesday morning, 6 October 2026, as part of an investigation into a series of incidents involving illegal motorbikes, traffic offences and behaviour directed at motorists around Darlington. The police operation was announced publicly on 7 October 2026.

The investigation began after police were called to the Southern Expressway at about 11:45pm on 28 September following reports that eggs had been thrown at passing vehicles. Police subsequently established that the eggs were allegedly stolen from a nearby service station.

As detectives continued investigating the egg-throwing incident, they also examined a number of alleged traffic offences involving electric motorbikes. Police said the investigation eventually led officers to a property in Hove, where a search was carried out.

During the search, officers allegedly seized two high-powered electric motorbikes, along with motorbike clothing, helmets, mobile phones and a Go Pro camera. The seized equipment is expected to form part of the investigation as police examine the alleged behaviour and identify those involved.

Two youths were arrested following the police operation. Investigators are examining their alleged involvement in the incidents, including the reported behaviour towards motorists and the use of electric motorbikes in connection with alleged traffic offences.

The investigation highlights growing police attention on high-powered electric bikes being used on public roads. Depending on their specifications, some electric motorcycles can be subject to registration, licensing and other road requirements. Using an unregistered or inappropriate vehicle on public roads can create significant safety concerns, particularly when riders allegedly fail to comply with road rules.

Police have not alleged that every person riding an electric bike in the area was involved in the offences. The investigation is focused on the individuals and incidents identified through police inquiries.

The alleged egg-throwing incident on the Southern Expressway also created a potential hazard for passing motorists. Objects thrown at moving vehicles can distract drivers or cause them to suddenly brake or change direction, potentially creating a serious crash risk.

The seized Go Pro camera and mobile phones may also assist investigators in establishing what occurred and identifying other people who may have been involved. Police have not released detailed information about the contents of the devices while the investigation continues.

Authorities are continuing to investigate the alleged offences and have not indicated that the matter is connected to any previously reported incidents elsewhere in Adelaide.

The two youths remain subject to the legal process, and any allegations against them must be proven in court. Further charges or court action may follow as police complete their investigation.

South Australia Police announced the arrests on 7 October 2026, making this a fresh development for today's news cycle.