New Delhi, Jan. 30 -- German investigators searched the offices of Deutsche Bank, Germany's largest, on Wednesday in connection with an investigation into possible money laundering, officials said.

Prosecutors in Frankfurt said that the probe focused on "unknown employees" and the bank's prior business relationships to foreign entities which were in turn suspected of being used to launder money. Offices were searched in Frankfurt, where the bank is headquartered, and in Berlin. The Frankfurt prosecutor's office said it could not provide more information on the nature and size of the transactions under scrutiny.

Deutsche Bank said in a statement that "we confirm that the Frankfurt public prosecutor's office is on site in our offices. The...