It was at the end of August that the Polarbrödsfabrik in Älvsbyn burned to the ground.
Six months later, a number of investigations have begun to trickle in.
SVT Norrbotten has reviewed the reports that are currently available.
What really happened - and what was missing?
SVT lists here four important things that went wrong with the fire at Polarbröd's factory in Älvsbyn.