The founder of whistleblower Web site WikiLeaks says the US government is involved in a campaign of "financial warfare" against the group.
The Guardian has obtained correspondence between WikiLeaks and British-based online payment company Moneybookers, in which the company explains that it has "terminated the business relationship" with WikiLeaks because the Web site has been added to "blacklists in Australia and watchlists in the USA."
"This is likely to cause a huge backlash against Moneybookers," Assange told the Guardian. "Craven behavior in relation to the US government is unlikely to be seen sympathetically."
Assange has previously said that Wikileaks is facing a fierce onslaught from the Pentagon after releasing tens of thousands of classified US military documents on the Afghan war.
"I need to express the seriousness of the attack against this media organization," he told an audience in London.