Barclays disclosed an investigation by the U.K. Financial Conduct Authority (FCA) into the bank’s anti-money laundering (AML) controls closed.

In an annual report filing Tuesday, Barclays said the investigation delved into the bank’s “compliance with U.K. money laundering regulations and the FCA’s rules and principles for businesses.” The probe was focused on “transaction monitoring in relation to certain business lines now in Barclays Bank UK PLC.”