Emergency medical services in Norway are operated both by the government (financed through the four Service Delivery Regions, each with its own regional health authority) and private organizations such as the Norwegian People's Aid, the Norwegian Red Cross and commercial transportation companies. In most circumstances, emergency ambulance service is organized by a local Health Trust, and may be operated directly, or contracted to private providers, such as national transportation companies, for which ambulances are just a part of their business operations. Private organisations are also used frequently by the police in search & rescue operations.