Amsterdam police have arrested 10 men from the same family after a two-year investigation into money laundering on a massive scale, involving both cash and crypto currencies.

The men, aged 24 to 60, were arrested in a string of raids across Amsterdam, Diemen, Almere and Paramaribo earlier this month, police said in a statement on Thursday.

On the day of raids, involving over 200 people and 15 locations, officials seized €1.4 million in cash, plus bitcoin, a gun, luxury items, phones and computers. They also found secret spaces in furniture and cars, where money could be stashed.

A building in Amsterdam’s Zuidoost district was the apparent headquarters of the operation, but the family also ran ‘offices’ in the Pijp and Oost, police said.

The investigation into laundering money for the international drugs trade began two years ago.

Observation teams recorded how family members moved bags of cash around but did not always intervene in the interests of the wider investigation.

In one raid, however, police confiscated €5 million in cash from a house in Purmerend. A father and son team, Digennaro and Delano B, were jailed for 3.5 and four years respectively, the Parool said.

In a second case linked to the family in June 2021, police arrested a man in his 50s at a rented house in De Kwakel, where they found three tonnes of cocaine and €11 million in cash. It was the biggest drugs and cash haul ever made by Amsterdam police. He was later jailed for eight years.

On Tuesday, seven of the 10 men arrested earlier in April were remanded in custody, while two others were released and a third had already been let go.

Police say they have not ruled out making further arrests.