The Sotra man was originally noticed by US authorities after he used his credit card in 1999 to purchase access to a Texas Internet portal selling child pornography, newspaper Bergens Tidende reports.

The couple who operated the Texas site were arrested in Sep. 1999 and their client list of 390,000 names from around the world led to a series of raids across the globe.

Police found a massive collection of various images on the man's computer, including obscene sexual acts involving children as young as two years of age.

The man told the Midhordland court that he began with an interest for finding 'normal' porn on the Internet and this evolved into a manic obsession for collecting child pornography.

The court found no mitigating circumstances and sentenced the Sotra man to 10 months in prison, with half of the sentence suspended.