Those who could face prosecution include former party secretary Johan Jakobsson and Per Jodenius, former press secretary for Liberal youth movement LUF.
“The suspects will now be able to look at the investigation and request any additions. Decisions will then be made on whether or not to prosecute,” said prosecutor Maria Häljebo.
It was revealed two weeks before the election that Jodenius had logged in several times to the Social Democrats’ internal computer network, Sapnet. Jodenius and Jakobsson were forced to resign at the height of the election campaign, and press chief Niki Westerberg took time out.
It was later revealed that the login details had been provided by an official in the Social Democrats’ own youth movement.
Liberal leader and education minister Lars Leijonborg said he did not believe that the investigation or any trial would further damage the party.
“If there are prosecutions it will be because individuals have behaved improperly. The whole thing had a negative effect on the election result for us, so we have already paid a political price for this. I don’t think that anyone believes that the Liberal Party as such was implicated in what happened,” he said.