Prosecutor Anders Perklev writes in a comment on the The Swedish Prosecution Authority's website that Perhson's comment suggests that he wants to meddle with and affect an ongoing case.
"It is remarkable that a parliamentarian openly criticises individual cases like this. It goes against the separation of power between legislators and the judiciary," Perklev writes on the website.
One of the lawyers representing one of the women in the case agrees. Elisabeth Massi Fritz told news agency TT that the prosecutors should not be "subjected to political pressure or let the media affect their decisions."
Liberal Party member Johan Pehrson said in an interview with Swedish Television that he wanted the Swedish prosecution to get on with the case against Assange.
"It's an exceptional case and that's why I think the prosecution should take another look at it and maybe get it out of the way for good. The case has major political and international implications, no one benefits from this," Pehrson said to SVT.
Assange is suspected of two cases of sexual harassment and rape in Sweden. The Wikileaks-founder has spent over a year at the Ecuadorian embassy in London and fears he would be extradited to the US if he should go to Sweden for questioning and any subsequent trial.