A Spanish judge has ruled that six executives of China's state-owned ICBC bank in Madrid should be detained pending a judicial probe into money laundering and tax fraud.

A court statement Saturday says three Industrial and Commercial Bank of China officials are remanded in jail without parole the investigations continue. Three others were given the option of paying 100,000 euros ($111,320) bail.

Five executives were arrested Wednesday on suspicion of money laundering, crimes against Spain's tax authority and forgery. The sixth, who previously worked in ICBC's Madrid offices but now works in the Luxembourg branch, was nabbed Friday.

All court interviews were held with interpreters present and all six waived their right not to testify.

The court statement says the bank continues to operate normally.