A computer program developed in New Zealand to track down online child pornographers has proved so successful that it is being used around the world.
It was developed by the Department of Internal Affairs three years ago to hunt down those trading images of child sexual abuse.
The program, called Super Squirrel Hunter, has already caught 150 people in New Zealand and 55 overseas.
Department of Internal Affairs deputy secretary Keith Manch says the computer program is able to pinpoint where material is being traded.
Mr Manch says it is being used in 19 countries, and has recently been translated for investigators in Germany, France and Scandinavia.
