Swedish prosecutors have told Al Jazeera that they did not make a mistake when they issued an arrest warrant, which was later quickly withdrawn, for Wikileaks founder Julian Assange on a rape charge. Assange's supporters say the accusations are part of a dirty tricks campaign. WikiLeaks has been criticised for leaking Afghan war documents. And despite warnings from the Pentagon, the website is preparing to release a fresh batch of classified documents. In an exclusive interview, Karin Rosander, a Swedish prosecutor, told Al Jazeera that no errors had been made in launching charges against Assange.