WikiLeaks has said that its Twitter account details have been subpoenaed by the US government and that it hopes to fight the order.
WikiLeaks said on Saturday that US investigators have gone to San Francisco-based Twitter Inc to demand private messages, contact information and other personal details of Julian Assange and three people associated with the secret-spilling website.
Twiter, a popular micro-blogging site, has declined comment.
Birgitta Jónsdóttir, a member of parliament in Iceland, said that Twitter notified her that it "received legal process requesting information regarding your Twitter account in [relation to WikiLeaks]."
"I have nothing to hide and have done nothing wrong - i have no intention to hand my information over willingly to DoJ [US department of justice]," she said on Twitter.
Jónsdóttir, a former WikiLeaks volunteer, said that she had "10 days to stop it [release of her Twitter information] via legal process before Twitter hands it over."
Twitter would not comment on the case, but said in a statement: "We're not going to comment on specific requests, but, to help users protect their rights, it's our policy to notify users about law enforcement and governmental requests for their information, unless we are prevented by law from doing so."
Meanwhile, WikiLeaks also said that it suspected other US internet companies had been contacted by American officials as part of the investigation.
US officials have been examining possible charges against WikiLeaks and its staff following a series of spectacular leaks that have embarrassed officials and damaged Washington's image.
