Deutsche Bank's head office and other locations in Frankfurt were raided by 170 police officers and tax investigators on Thursday. The German bank is suspected of helping clients to set up offshore companies in tax havens, prosecutors said. Investigators are also looking at whether Deutsche Bank failed to report suspicious transactions. Both the lender and prosecutors said the probe is related to the Panama Papers, a 2016 investigation into money laundering networks and shell companies set up by Panama-based law firm Mossack Fonseca. The investigation is yet another headache for Deutsche Bank. The lender struck a $7.2 billion deal with the US government in January 2017 to settle claims that it packaged and sold toxic mortgages. It was fined $630 million the same month over a Russian money laundering scheme. In September, Deutsche Bank was ordered by German regulators to tighten its controls. Other European lenders have also come under scrutiny for potential money laundering. HSBC (HBCYF) and ING (ING) have both settled money-laundering allegations in recent years. Danske Bank (DNKEY), the largest bank in Denmark, said in September that an internal investigation had uncovered a large number of suspicious accounts and transactions at its branch in Estonia. [Former US Treasury] Jimmy Gurul ... said that stronger deterrents are needed. "Even in the most egregious cases, banks are often only required to pay a monetary penalty for engaging in criminal activity," he said.