(CNN) -- Computer hackers supporting WikiLeaks shifted targets Thursday from Amazon to PayPal, they said, as Dutch authorities announced an arrest in connection with hacker attacks on the websites of MasterCard and Visa. The Dutch High Tech Crimes unit arrested a 16-year-old in The Hague, Netherlands, with prosecutors saying he confessed to attacks on the websites. "He is probably part of a larger group of hackers, who are under continued investigation," they said. The teen is due in court Friday in Rotterdam. Separately, a group of hackers calling themselves Anonymous Operations said they would attack PayPal, not Amazon.com, about an hour after an attack on Amazon was due to start.
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NEW: The U.N. High Commissioner for Human Rights blasts pressure on websites
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A Dutch teen is arrested over hacking attacks on MasterCard and Visa
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A hackers' collective says it doesn't have enough forces to target Amazon.com
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WikiLeaks denies any connection with the hackers and won't support or condemn them
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