British authorities are looking into possible wrongdoing in connection with the Bank of England’s efforts to inject liquidity into failing financial markets at the height of the financial crisis.

The U.K.’s Serious Fraud Office (SFO) confirmed today that it is investigating the central bank’s liquidity auctions during the financial crisis in 2007 and 2008. The investigation stems from an independent inquiry that the Bank of England commissioned last year.

In its own statement, the British central bank revealed that it commissioned a prominent lawyer, Lord Grabiner, to conduct an inquiry into those liquidity auctions. The Bank says that after that initial inquiry was completed, it referred the case to the SFO in November 2014. The SFO agreed to go ahead with its own follow-up investigation in December 2014.

The Bank did not provide any detail regarding the findings that were passed along for further investigation or the sort of conduct that is being examined. “Given the SFO investigation is ongoing, it is not appropriate for the Bank to provide any additional comment on the matter at this time,” it said.