Five people have been injured in a four-vehicle collision on the R501 in Carletonville on Thursday night."ER24 paramedics, along with other services, arrived on the scene at 22:56 to find the vehicles scattered in the road," ER24 spokesperson Russel Meiring said in a statement on Friday."Medics assessed the patients on the scene and found that two people had sustained numerous injuries and were in a critical condition while three others had sustained moderate injuries."The injured were treated on the scene.Two people who were critically injured, were provided with life-support interventions."Once treated, one of the critically injured patients was airlifted by a private medical helicopter to a provincial hospital while the remaining patients were transported by ambulance," Meiring added.The circumstances surrounding the accident are not yet known.Local authorities were on the scene for further investigations.