The police have registered three complaints against Borg for his behaviour at the party the weekend before last. Two have been dropped down because of their similarity to the first.
The complaint on which the investigation is being launched is built wholly on press reports of Borg’s behavior at the private party, police have told Swedish Radio, and did not come from either a witness or from one of Borg's alleged victims.
According to the Svenska Dagbladet newspaper, Borg, who resigned from his position as deputy chairman of of the investment group Kinnevik over the weekend, has now also left his post as an advisor to the bank Citigroup.
Anders Borg was finance minister in the centre-right Alliance government of 2006-2014, and was then in the Moderate Party.