On Monday morning, police raided the club house of the Hells Angels MC in Harlingen.
According to the Dutch anti-fraud agency FIOD, the raid was aimed at finding evidence of money laundering.
The raid was not aimed at the entire Northcoast Chapter of the Hells Angels MC: it is part of an investigation into one individual who is suspected of money laundering.
Several police officers in balaclavas conducted searches at the Hells Angels compound on the Marconistraat, which was closed to traffic, and a warehouse on the Kelvinstraat.