A crash at a roundabout in Hornby, a suburb of Christchurch, leaves one person critically injured, according to multiple reports. The incident occurs on Tuesday morning and involves two vehicles. Emergency services respond at the scene in Hornby after the collision. One person is reported to be in critical condition, while details about the other vehicle and any additional injuries are not described in the provided accounts. The NZ Herald also reports that the roundabout is closed following the serious crash. No information is provided in the summaries about the cause of the crash, the identities of those involved, or the extent of injuries beyond the person’s critical condition. Authorities continue to manage the scene as part of the immediate response, including controlling traffic around the closed intersection.