Among the accusations lobbied against Sweden, the country's foreign minister, Carl Bildt, will be identified as a "US spy" who regularly hands information over to Washington D.C.
The document, seen by journalists at the Swedish newspaper Expressen, claims that Karl Rove, who served under US President George W. Bush at the White House, has been named as Bildt's point of contact.
Wikileaks spokesperson Kristinn Hrafnsson last night told Expressen that he couldn't disclose more details but that the full document would soon be made public. "I can only confirm that the document shows the close relationship between Carl Bildt and insiders in Washington," he said.
Bildt has himself described Rove as a personal friend and made no secret of their close relationship, reports Expressen.
Assange has repeatedly denied accusations of rape and sexual assault, reported to police after he visited Sweden in the summer of 2010. He has claimed the charges are politically motivated.
In a newspaper interview in his native Australia, Assange referred to Sweden, which in international comparisons has strict laws on sexual assault and rape, as "the Saudi Arabia of feminism".
Assange further claims that his extradition to Sweden, where he is wanted for questioning by police, could lead to his deportation to the USA whose war time actions have been a prime focus of Wikileaks' information campaigns.
From there, Assange argues, he would risk being sent to the military prison Guantánamo, used for "war on terror" suspects.