Man Who 'Slowed the Internet' Arrested: Officials Sven Kamphuis accused of 'unprecedented heavy attacks' By Matt Cantor, Newser User Posted Apr 27, 2013 7:30 AM CDT 12 comments Comments A man has been arrested over a cyberattack that slowed down the Internet. (Shutterstock) (Newser) – Spanish police have nabbed a suspect in a cyberattack called the biggest in history. Authorities in Barcelona arrested a Dutch man known as "SK." That's Sven Olaf Kamphuis, the head of Cyberbunker, an organization opposed to spam-fighting group Spamhaus, a friend says. Kamphuis is "suspected of unprecedented heavy attacks" against Spamhaus, which had accused Cyberbunker of being a spam threat. Kamphuis, 35, says he wasn't involved in the attack, though on Facebook, he has called for an end to "illegal slander and blackmail censorship project" Spamhaus, the New York Times reports. Police took computers, hard drives, and phones from his Barcelona house; Dutch prosecutors say he'll be sent back to the Netherlands, the BBC reports. Posts on a hacker web forum say Kamphuis is innocent: "We demand u to release Sven or we will indeed start the biggest attack u humans have ever experienced toward The Internet, and yourself."