The employees were taken to the hospital for control. The police have no information on how they were affected.
The staff alerted the police at 11 o'clock on Wednesday. Several patrols, as well as an ambulance and rescue service, were dispatched.
A police patrol then took the letter for analysis, after assessing that it did not need to be handled by the national bomb squad.
A note that was included in the shipment has also been seized. The text on the note can be perceived as threatening, according to the police.
It must be analyzed before we know for sure what this is, says the police's press spokesperson Evelina Olsson.
The police have filed a report on gross unlawful threats.
