Deutsche Bank has previously faced scrutiny related to money laundering. Last year, the bank paid a $425 million fine in New York for helping clients of its Moscow office illegally move $10 billion out of Russia. Also last year, the Federal Reserve fined Deutsche Bank $41 million for failing to have an effective system for complying with bank secrecy laws and laws to prevent money laundering. In September, the German bank regulator said it had appointed a monitor to ensure that Deutsche Bank had adequate measures in place to prevent money laundering and financing of terrorism.

Deutsche Bank has also been drawn into scandal at Denmark’s Danske Bank, which faces criminal investigations over suspected money laundering in its Estonian branch. Deutsche, among other banks, handled certain transactions for Danske. Deutsche Bank says it stopped doing work for the Danske Bank Estonian branch in 2015.

Police raids are nothing new at the bank, either. The authorities conducted large-scale searches in 2015 and 2012 in cases involving alleged tax fraud.

The latest investigation focuses on two employees, who were not publicly identified but whose ages were given as 50 and 46, as well as other people whom investigators have not yet identified. In 2016 alone, prosecutors said, a Deutsche Bank subsidiary in the British Virgin Islands served 900 customers with transactions worth 311 million, or more than $350 million.

Deutsche Bank employees are accused of neglecting their duty to report suspicious transactions “although ample grounds existed,” prosecutors said in a statement.

“Deutsche Bank helped customers found offshore organizations in tax havens by transferring illegally acquired money without alerting authorities to suspected money laundering,” prosecutors said. Nadja Niesen, a spokeswoman for the Frankfurt prosecutors, declined to comment beyond information given in the written statement.

The raids were the latest example of how the Panama Papers have, over the past two years, shed light on the methods that people and companies use to hide their wealth and avoid taxes.