LONDON: Cyber activists striking at companies seen as enemies of WikiLeaks tried to block the website of online payment firm Moneybookers Friday but denied their campaign was intended to damage economic activity. Some campaigners communicating on Internet channels also called for attacks on official Dutch websites following the arrest in The Hague Thursday of a 16-year-old boy suspected of involvement in the online campaign. A string of US institutions has ended services to WikiLeaks after the website published thousands of secret US diplomatic reports that have caused tension between Washington and several of its allies. The attack on Moneybookers appeared to have blocked the site for about two minutes at about 1235 GMT but it subsequently came back online. The activists promised to continue their assault and cited Interpol's site as a possible target. “If we don't panic, and we get bigger, no one can stop us,” wrote a participant in a chat room used by what the activists call the Operation Payback campaign. In a statement, Moneybookers confirmed its website had been unavailable for a few minutes but the service was back up. “In light of recent events, we have been tightening security and applying additional vigilance which means that despite the attacks we continue to provide our service to users and merchants 24/7,” it said. The activists, who collectively call themselves Anonymous, said in a statement they were not hackers but rather “average Internet citizens”. “We do not want to steal your personal information or credit card numbers. We also do not seek to attack critical infrastructure of companies such as Mastercard, Visa, PayPal or Amazon,” the statement said. “The point of Operation Payback was never to target critical infrastructure of any of the companies or organizations affected. Rather than doing that, we focused on their corporate websites, which is to say, their online ‘public face'. “It is a symbolic action,” it said. Online retail and web-hosting powerhouse Amazon stopped hosting WikiLeaks' website last week, and Thursday it briefly became the main target of the pro-WikiLeaks campaigners – before they admitted it was too big for them, for the moment. The Anonymous statement followed one by WikiLeaks which said the website had no links to the cyber attacks, and neither supported nor condemned them.