Wikileaks, the organization that recently released thousands of secret U.S. documents, says it doesn't have any ties to the recent cyber attacks on the websites of international businesses.
Those attacks by hackers have been carried out on behalf of Wikileaks. The organization says it does not support or condemn the cyber attacks.
Hackers worldwide have come to the defense of WikiLeaks, sparking a cyber war against top companies that stopped supporting the controversial website.
"They are being effectively targeted by people who see themselves as activists and who want to make a point that they stand for freedom of information that Wikileaks brings," said Alexis Mifsud, chief executive of Ixaris.
On Thursday, hackers shifted their attention to planned attacks on Amazon.com and Paypal.
Credit card giant Mastercard was hit by a cyber attack on Wednesday that created technical problems with its website.
Mastercard is the latest in a string of U.S. companies to cut ties with WikiLeaks. Visa, Amazon, and PayPal have also ended their accounts.
WikiLeaks has embarrassed the United States government by publishing several top secret documents. The website's founder Julian Assange is now behind bars in London and fighting extradition to Sweden, where he faces charges for alleged sex crimes.
Meanwhile, WikiLeaks published more confidential U.S. documents overnight Wednesday.