All seven were detained despite their denials after the police operation in Sundsvall

Three men were arrested on Monday, all of whom are on probable grounds suspected of, among other things, preparation for murder.

This weekend four more people were arrested for, among other things, serious weapons offenses and serious drug offences, and none of those now in custody are older than 23 years.

All seven - six young men and one young woman - are in custody with restrictions, which means that they must not have access to a computer, telephone or have contact with anyone who could complicate the investigation, among other things.

In all negotiations, the district court decided that a ban on disclosure, a form of secrecy, should apply.