A company asked by Visa to investigate WikiLeaks' finances found no proof the group's fundraising arm is breaking the law in its home base of Iceland. But Visa Europe Ltd. said Wednesday it would continue blocking donations to the secret-spilling site until it completes its own investigation. Company spokeswoman Amanda Kamin said she couldn't say when Visa's inquiry, now stretching into its eighth week, would be finished.

Visa was one of several American companies that cut its ties with WikiLeaks after it began publishing a massive trove of secret U.S. diplomatic memos late last year. U.S. officials have accused the site of putting its national security at risk -- a claim WikiLeaks says is an attempt to distract from the memos' embarrassing content.

When it announced its decision to suspend WikiLeaks donations on Dec. 8, Visa said it was awaiting an investigation into "the nature of its business and whether it contravenes Visa operating rules" -- though it did not go into details.

The Norway-based financial services company Teller AS, which Visa ordered to look into WikiLeaks and its fundraising body, the Sunshine Press, found no proof of any wrongdoing.