On Tuesday tests showed it was not anthrax. And although police do not know what it really is, they know it is not dangerous, says spokesperson Ewa-Gun Westford to Swedish television SVT.
The envelope was first opened at the Tax Agency (Skatteverket) in the southern city of Malmö, and fifteen people have been treated for possible contamination. The opened envelope was then sent on to the Kronofogden debt agency and five people have been treated after discovering the powder.
Four police officers were also treated.
The Kronofodgen offices were evacuated and it is not yet known when they can be used again.
The agencies will now look at how they can handle potentially dangerous postal items.