Germany's largest lender Deutsche Bank Aktiengesellschaft (XTRA:DBK) has stepped up internal discussions about mergers and acquisition deals involving European lenders like Commerzbank AG (XTRA:CBK) and ABN AMRO Bank N.V. (ENXTAM:ABN), Bloomberg News reported. Deutsche Bank has not formally mandated any investment bank to help with its deal hunt nor has it held talks with any of its potential targets, the report said, citing people familiar with the matter. ABN Amro, Deutsche Bank and Commerzbank declined to comment.