– We cannot rule out that there will be more detentions, says Erik Creutz, officer on duty at the police.
The shot man is being treated for unclear injuries. All those involved are already known to the police.
The shooting occurred outdoors in connection with a high school in western Eskilstuna.
The police have launched a preliminary investigation into attempted murder and the scene has been cordoned off. The prosecutor will later during the night decide on a possible arrest.