The man arrested is believed to be Sven Kamphuis, the owner and manager of Dutch hosting firm Cyberbunker that has been implicated in the attack.

BBC: Dutchman arrested over huge web attack

In a statement in March, Cyberbunker "spokesman" Sven Kamphuis took exception to Spamhaus's action, saying in messages sent to the press that it had no right to decide "what goes and does not go on the internet".

BBC: Spamhaus hacking suspect 'had mobile attack van'

"This here is the internet community puking out SpamHaus, " CyberBunker founder Sven Olaf Kamphuis told CNN.

CNN: Massive cyberattack hits Internet users