British bank Barclays announced this week in a filing with the London Stock Exchange that it is under investigation by both the U.S. Department of Justice and the Securities and Exchange Commission for potential violations of the Foreign Corrupt Practices Act.

Barclays says it is being probed over whether the bank violated the FCPA relating to its relationships with certain third parties who assisted Barclays to win or retain business. The bank did not clarify in the filing where or when the potential violations may have occurred.

The announcement, however, follows an investigation underway by the U.K. Serious Fraud Office and Britain's Financial Services Authority relating to fees payable under “certain commercial arrangements” between Barclays and Qatar's sovereign wealth fund. The investigation is seeking to determine whether Barclays solicited investments from the sovereign wealth fund related to Barclays capital raisings in 2008.

In addition to the probe, the Federal Energy Regulatory Commission has also threatened to fine Barclays a record $470 million to settle allegations that the bank and four of its traders manipulated California electricity markets from November 2006 to December 2008. Barclays, which has 30 days to show why it should not be penalized, said in the filing that it intends to "vigorously defend this matter.”

The announcement comes just four months after the bank paid $453 million in total fines and penalties to the Justice Department, Commodities Futures Trading Commission, and London's Financial Service Authority in June related to the LIBOR trading scandal. Criminal prosecutors in the U.S. and other countries are investigating several major banks worldwide over allegations that they rigged the London Interbank Offered Rate (LIBOR)—a benchmark used to set interest rates for trillions of dollars of consumer loans—in order to boost profits.