A Dutchman has been arrested and charged with launching the distributed denial-of-service (DDoS) attack on Spamhaus that caused a global internet slowdown last month.

Named by media sources as Sven Olof Kamphuis, the Sydney Morning Herald said that he operated from a bunker and had a van capable of hacking into networks anywhere in the country.

press release issued by the Dutch Public Prosecutor Service named the suspect only by the initials SK and said he was living in Barcelona. It said: “SK is suspected of unprecedented heavy attacks on the non-profit organisation Spamhaus, where anti-spam databases are managed. This so-called DDoS attacks last month were also partners of the United States, Spamhaus in the Netherlands and Great Britain. The attackers were using forged IP addresses.”

It also said that computers, data carriers and mobile phones were seized and that Kamphuis would be transferred to the Dutch public prosecutor.

A pastebin statement, apparently from hacktivist Anonymous, said that Kamphuis, also known as cb3rob, has had his freedom taken away by governments more than once "and enough is enough".

It said: “These 'governments' of simple human beings believe Kamphuis has been involved with the latest digital attacks (DDoS) against Spamhaus, and such. This is based on false information.

“We demand you to release Kamphuis or we will indeed start the biggest attack you humans have ever experienced towards the internet, and yourself. Anything and all connected will suffer and do you silly governments really think you can stop millions of human beings? You have no chance, at all.

“We have seen and tested how weak the current security in the Netherlands is. Banks, airports, even your precious 'DigiD' was taken out within minutes. You have been warned.”