The so-called risk supporters can be linked to a total of around 100 crime suspicions, the police state in a press release.
"It's about a broad spectrum of crimes, both in direct connection to matches and outside football events", says Emelie Kullmyr, police area manager in Greater Gothenburg.
Ongoing investigations also show that risk supporters are suspected of trying to recruit young people into crime. It concerns suspicions of crimes involving minors in criminal activity.
"Multicriminal"
"We view attempts to socialize young people into crime as particularly serious. There, we work closely with other authorities and municipalities, as well as schools and social services to catch signals and prevent young people from being drawn into crime", says Emelie Kullmyr.
Other ongoing preliminary investigations concern several cases of serious assault, tax crimes, and the law on flammable and explosive goods.
"The investigations we have conducted have concerned individuals who engage in multicriminal acts, i.e. not just minor offenses in connection with football matches. Further investigations are ongoing where more individuals may be suspected of crimes", says Mats Ihlbom, senior prosecutor, in the press release.
The police are releasing their press release just a few days after there were reports that IFK Gothenburg's club director Håkan Mild has been subjected to threats and hatred from supporters. TV4 News has reported that Mild has been given police protection.
"IFK Gothenburg has not made any police report. We will not comment on this further and must refer to the police", security manager Jonas Arlmark has said in a statement to TT and other media.
The Gothenburg police have not wanted to comment on the reports surrounding Mild, according to TV4.
Boycotted the match
In connection with IFK Gothenburg's Allsvenskan home match against Brommapojkarna on Sunday, large parts of the stand on Gamla Ullevi were empty. Supporters boycotted the match after the supporter group was denied entry with a large flag.
The club has since written on its website that a mistake was made when the flag was stopped from being brought in.
"It's important to note that it was not denied due to any written message. The assessment turned out to be incorrect and we regret that", IFK Gothenburg wrote.
The police in Gothenburg state that around 30 so-called risk supporters can be linked to around 100 crime suspicions, but it's not just about crimes that have been committed in connection with football matches.
There are ongoing preliminary investigations concerning several cases of serious assault, tax crimes, and crimes against the law on flammable and explosive goods.
According to the police, several of the individuals have previously been convicted of, for example, violence against women, narcotics crimes, attempted serious extortion, general destruction, and weapons crimes.
The police write in a press release that they have seen connections to various criminal networks, motorcycle gangs, and violent political extremism in several cases.
The police have also investigated crimes that have occurred in connection with football matches, such as sabotage against emergency services, violence against officials, and violent riot. These crimes have been reported to the prosecutor.