The head of supermarket group Jumbo remains in custody while an investigation into potential money laundering continues, the Financieele Dagblad reported on Friday.

Frits van Eerd is one of eight people being held following police raids on Tuesday. One 33-year-old man has been released but remains a suspect, the public prosecution department said.

Van Eerd is being questioned as part of a major investigation into money laundering and tax fraud, but is not the main suspect, the FD said. That is said to be 58-year-old car trader Theo E who leads the motocross team sponsored by Jumbo

Prosecutors said earlier the investigation focuses on transactions in real estate and cars, unexplained large cash deposits and sponsorship contracts in motocross.