Investigators searched the offices of Germany’s largest lender, Deutsche Bank, Prosecutors said on Friday, with a focus on the bank’s anti-money-laundering efforts.

According to them, officers from the BKA federal police, the financial watchdog BaFin, and the Frankfurt prosecutor’s office had been “deployed” to the scene.

The raid was linked to “suspicious activity reports filed by the bank” in relation to money laundering, according to a statement from Deutsche Bank, which added that it was cooperating with authorities.

Financial newspaper Handelsblatt said investigators were probing a transaction carried out several years ago involving Rifaat al-Assad, the uncle of Syrian leader Bashar al-Assad.

Although Assad did not have an account with Deutsche Bank, the institution is said to have distributed money to the Assad family as part of a technical agreement with other banks, the paper reported.

Deutsche Bank has in recent years been closely watched by financial authorities in relation to suspicious transactions.

BaFin in 2021 called on management at the lender to redouble their efforts to tackle money-laundering activities.

Investigators searched Deutsche Bank’s headquarters in 2019 for failing to report possibly illicit money flows.

The Frankfurt-based group also came under scrutiny for its role as a correspondence bank that handled foreign transactions for Danske Bank’s Estonian branch, at the center of a 200-billion-euro ($212-billion) money-laundering affair between 2007 and 2015.

Following an investigation by Frankfurt prosecutors, Deutsche Bank agreed to pay a fine of 13.5 million euros for failing to report suspicious activity in a timely manner.

Deutsche Bank shares fell on the Frankfurt Stock Exchange after local media reported the news, trading around minus 2.9 at 13:30 local time (1130 GMT).