Norr Media is the first to report that the LKAB managers have been released.
It was at the end of July 2018 that the industrial mechanic Julia Markström walked along a so-called access road when part of the lattice floor suddenly gave way.
She fell five meters onto a treadmill and then died of her injuries.
Stig Andersson, chamber prosecutor at the National Unit for Environmental and Work Environment Objectives, has now made his decision.
LKAB receives a penalty order of SEK 3 million for a work environment crime by causing another person's death and negligence.
- I have taken advantage of all the evidence that is available, but as I said, I have not been able to prove crimes against those who were notified that they were personally suspects, says Stig Andersson to SVT.