A major emergency response has been launched in Perth's northern suburbs after a passenger bus crashed into a tree in Wanneroo, leaving multiple people injured and prompting a significant deployment of emergency services.

The crash occurred on Drovers Place in Wanneroo during the late morning on Thursday. Emergency crews, including paramedics, firefighters and police officers, were called to the scene following reports that a bus had left the roadway and collided with a tree. Initial information indicates that at least five people sustained injuries in the incident.

Authorities described the incident as a serious crash, with emergency personnel arriving quickly to assess passengers and provide medical treatment. Ambulance crews established a treatment area while firefighters assisted in securing the scene and ensuring there were no immediate safety risks associated with the damaged vehicle.

At the time of the initial response, emergency services were focused on assessing the condition of those injured and determining whether any occupants remained trapped within the vehicle. Early reports indicated multiple casualties requiring medical attention, although the full extent of injuries had not yet been publicly disclosed.

Police closed portions of the surrounding area while investigators and emergency responders worked at the scene. Traffic disruptions were reported in the vicinity as motorists were advised to avoid the area and seek alternative routes. The closure allowed emergency crews to safely manage the incident and begin preliminary investigations into how the crash occurred.

The cause of the collision remains under investigation. Authorities have not yet confirmed the circumstances that led to the bus leaving the roadway. Investigators are expected to examine a range of factors, including road conditions, vehicle condition, driver circumstances and witness accounts as part of the inquiry.

Bus crashes involving multiple passengers often require coordinated responses from several emergency agencies due to the potential for large numbers of injuries. Emergency management procedures include rapid triage, treatment prioritisation and transport arrangements to nearby hospitals where necessary.

Wanneroo is one of Perth's rapidly growing northern suburbs, with local roads frequently used by public transport services, school buses and community transport providers. Incidents involving buses can have significant impacts on local traffic and public transport operations, particularly during busy travel periods.

Authorities are expected to release further information regarding the identities and conditions of those injured once families have been notified and medical assessments have been completed. At this stage, no fatalities have been reported publicly.

Road crash investigators will continue examining the scene and collecting evidence to establish the sequence of events leading up to the collision. Witnesses who observed the crash or who may have dashcam footage from the area could be asked to assist police with their inquiries.

The incident serves as a reminder of the importance of road safety and the challenges faced by emergency services responding to major transport incidents. Updates are expected as investigations continue and authorities provide additional details about the injured passengers and the circumstances surrounding the crash.