A suspected explosive object was found in a toilet at Bergvik's shopping center on 15 November last year.
Large parts of the shopping center were evacuated and national bomb protection was called.
The object later turned out to be harmless according to the police.
- But it is quite obvious that it was intended to be perceived as a dangerous and explosive object, said Mats Öhman, spokesman for the Bergslagen Police Region.
Seriously illegal threat
According to NWT, the suspect is a man who has been known to the police since before, something that Aronsson does not want to confirm.
- No, I do not want to comment on it at the moment.
The person is suspected of a serious illegal threat but has not been arrested for the crime.