According to Aftonbladet, one of the biggest newspapers in Sweden, this was not the case. 16 hours before he announced his resignation they confronted him with evidence of a crime committed by him, though they did not reveal what this crime was.
In todays newspaper, though, a 30 years old woman claimed that Littorin had purchased sex from her in 2006, and that she had made it very clear to him that she was <i>selling</i> sex. In Sweden this is a crime punishible by up to six months in prison, though the time that has passed since the crime was committed means that he can't be sentenced for it.
Comments by other politicians:
Göran Hägglund (other party, the Christian Democrats, but also in the government) says that there is "no defense for the actions attributed to him" and that "everything is turned upside-down" is this turns out to be true.
Peter Eriksson (one of the party leaders in the Green Party, in the opposition) thinks that this explains why he "disappeared so quickly with his tail between his legs", and feels that the government has taken very poor care of this situation, and that they've tried to show off a polished surface instead of revealing the whole truth.
The other party leaders have refused to comment.
And here's how Aftonbladet's readers feel that this will affect the election:
36.0% think that it will work for the opposition
10.9% feel that it will help the government
and 53.1% think that it won't have any influence at all.
sources: http://www.aftonbladet.se/nyheter/article7447620.ab (Swedish)