Emergency services responded to a serious workplace accident in Oslo after reports of an individual being struck by a heavy object. The incident occurred at a construction site, according to police reports. Rescue personnel successfully freed the injured person, but their condition is described as critical. Authorities have initiated a preliminary investigation at the scene to determine the cause of the accident. Details regarding the specific object involved and the nature of the work being performed have not yet been released. The investigation will focus on potential safety protocol breaches and contributing factors. Further updates are expected as the investigation progresses.