Emergency services respond to a reported incident at a home in Mount Gambier, in south-east South Australia, after suspected carbon monoxide poisoning. Two outlets report that the call is made just before 9am on Saturday 11 July to a property on Penola Road. On arrival, responders find four occupants inside the home who are unconscious. One man later dies, while the other three people are taken to hospital for treatment. The incident is treated as suspected carbon monoxide poisoning, though the exact cause—such as a specific appliance or ventilation issue—is not detailed in the provided reports. No further information about the victims’ identities, ages, or current medical conditions is included in the source summaries. Emergency services coordinate the response at the scene and transport surviving occupants to hospital. The reports are consistent in describing the time of the call, the location, the discovery of four unconscious people, and that one death occurs following treatment.