In a long-running European tax investigation, Belgian authorities reportedly received a list of clients with accounts at the Swiss bank.

Belgian authorities are homing on in Credit Suisse in connection with undeclared assets held offshore, according to«L'Echo» (in French). The Belgian outlet reported that officials in Brussels came to possess a list delivered by French officials of 2,600 people who are or were clients at the Swiss bank.

French prosecutors have been looking into Credit Suisse's dealings as well, following raids three years ago on the bank's offices in Paris, Amsterdam, and in London. Dutch authorities seized luxury cars, real estate, and gold in the move.

Probe In Full Swing

Although the probe appears to have gone quiet, Dutch daily «De Telegraaf» (behind paywall, in Dutch) reported recently that an investigation into Credit Suisse, under the project name «Montenegro,» is in full swing. In Belgium, the probe focuses on client relationships between 2003 and 2014. The bank never had offices in Belgium, but worked together with insurer Axa, «L'Echo» reported.

Last year, HSBC's Swiss arm paid 300 million euros ($354 million) to settle a similar probe in Belgium. The French outlet quoted a Credit Suisse spokesman saying the bank pursues a zero tolerance-policy on undeclared money and adheres to applicable laws and rules in its activities.