German law enforcement authorities targeted offices of the Deutsche Bank management board Friday as they spent a second day gathering evidence in an investigation into whether the bank helped clients launder money in an offshore tax haven.

Searches at the top level of management significantly raised the stakes for Deutsche Bank, which was already reeling at the prospect of another scandal. The bank has been battered by accusations of financial wrongdoing during the last decade and has paid billions of euros in fines. So far no members at the top level of management have been convicted of criminal wrongdoing.

Nadja Niesen, a spokeswoman for prosecutors in Frankfurt, declined to say Friday which of the nine management board members’ offices were searched. But she said investigators were active on the floor reserved for the upper echelon of management, which is at the top of the twin tinted-glass towers in Frankfurt where the bank has its headquarters.

Prosecutors said Deutsche Bank had been cooperating “fully” with the investigation. “Deutsche Bank is answering questions posed by investigators unconditionally,” Albrecht Schreiber, lead state prosecutor in Frankfurt, said in a statement.