At 6am local time on Wednesday morning, former KSW middleweight champion Michal Materla was arrested by Poland’s Central Investigative Bureau (CBS) for alleged participation in organized crime.

According to local reports, 10 armed police officers stormed the Polish MMA star’s home in Szczecin and arrested him in front of his wife and young children. While Materla was shocked at the sudden intrusion in his home, reports confirmed he did not resist arrest.

Materla was one of 21 arrests made across three Polish regions, all of whom are believed to be related to the same crime. The investigation is being led by the District Prosecutor’s Office in Poznan, though neither the police nor the prosecutor have revealed the details of the arrest. However, it appears as though Materla will be detained for three months at the prosecutor’s request while information is gathered for the case.

While it is yet to be confirmed that Materla was involved in organized crime, the CBS unit that arrested him on Wednesday morning is an special unit dedicated to identifying and combating organized crime in Poland.

When asked to comment on the situation, KSW released a statement to BloodyElbow, which can be read in full below:

In connection with the latest press reports regarding the detention of Michał Materla by the Central Investigative Bureau, we would like to inform you that KSW will advise you of its position on this matter as soon as the police authorities publicly release information on the reasons for the detention and, should the case come to Court, on any eventual judgement. We value and respect Michał Materla as a sportsman. We are also aware that for many fighters sport is a new and better path to follow in life after personal difficulties in the past. As a matter of principle, we do not write any one off who made up for their past mistakes and made legal amends. At the same time, there is no place for breaking the law in KSW and in this respect KSW will not treat any such cases with leniency, either now or in the future. In this instance, it is for the Courts to decide whether the law has been broken.

Materla held the KSW middleweight championship for three years (2012-15) before losing by knockout to Mamed Khalidov last year in Krakow. Since then, he compiled two consecutive wins against Antoni Chmielewski and UFC veteran Rousimar Palhares. He remains one of the most popular fighters in Poland.