A ministry statement today said the suspect, a Danish national of Moroccan origin, worked with a network of least 24 companies that evaded more than 8 million euros in taxes to finance the IS. It gave no details on which companies were involved.
Police say the group recruited at least 10 IS combatants from Denmark, Germany and Spain.
The man was arrested in Spain's north African enclave of Melilla in an operation coordinated with Danish police.