LONDON -- WikiLeaks supporters struck back Wednesday at perceived enemies of the site and its jailed founder Julian Assange, launching hack attacks against Mastercard, Swedish prosecutors, a Swedish defense lawyer and a Swiss group that froze Assange's bank account.
Internet hacktivists operating under the label "Operation Payback" claimed responsibility in a Twitter message for causing technological problems at MasterCard, which pulled the plug on its relationship with WikiLeaks on Tuesday.
MasterCard said it was "experiencing heavy traffic," but spokesman James Issokson told The Associated Press the company would not confirm whether WikiLeaks was involved. Issokson said MasterCard was trying to restore service Wednesday but was not sure how long that would take. The website's technical problems have no impact on consumers using credit cards for secure transactions, he added.