A child has died following a stabbing attack in the Blue Mountains, with two other children and a woman now in critical condition, according to New South Wales police. The incident occurred on Waratah Road in Valley Heights, where emergency services were called after reports of three children and a woman suffering from stab wounds inside a vehicle. Officers from the Blue Mountains Police Area Command said that several members of the public provided first aid to the woman and the three children before contacting emergency services on Triple Zero, the Australian equivalent of 911. One of the children was found dead in the vehicle, while the others and the woman were treated at the scene by NSW Ambulance before being transported to Westmead Hospital. All three are currently in critical condition. The woman is believed to be in her 40s, and the two children are thought to be under five years old. A crime scene has been established at the location, and police have stated they are not currently looking for any other individuals involved in the incident. Authorities are appealing for any witnesses or anyone with information, including mobile phone or dashcam footage of the attack, to contact Crime Stoppers. They are urging the public to assist in the investigation by sharing any relevant details they may have.