"No clear connection or pattern can be seen, apart from it being a white powder that has been sent," said Håkan Wall of the police's national operative unit, NOA.
Since the 5th of January, when the Enforcement Office in Malmö received an envelope with white powder, nine similar incidents, with 16 different letters, have been reported. The national operative unit has checked whether there have been any previous threats against the people whose names have been on the envelopes, but this is not the case.
According to Håkan Wall, it is possible that it is different individuals behind the letters, who have been inspired by the attention it has attracted in the media.
The white powder would have been lethal, if it was anthrax, and had lead to closures of offices, people being isolated, bomb disposal units being called out.
The final analysis of the substance(s) is still ongoing, but none of the contents of the 16 envelopes are deemed as dangerous. Håkan Wall says it could simply be flour.
"the most common white powder we have got is different kinds of flour. I cannot confirm that this is the case yet, but it is not an unreasonable guess," said Håkan Wall.
So far, there are no suspects, but even if it is only flour that has been sent, this is deemed as a crime. According to the news agency TT, this could be seen as threat, false alarm and public destruction.