U.S. regulators are looking into how Wall Street firms like Goldman Sachs (GS.N) helped debt-stricken Greece arrange derivatives deals that critics say were used to disguise the size of its budget deficits.

Federal Reserve Chairman Ben Bernanke made the disclosure on Thursday and suggested securities regulators also wanted the information.

“We are looking into a number of questions related to Goldman Sachs and other companies in their derivatives arrangements with Greece,” Bernanke said in response to a question from U.S. Senate banking Committee Chairman Sen. Christopher Dodd before testifying to the group for a second day on the state of the U.S. economy.

Bernanke said the Securities and Exchange Commission similarly was “interested” in Wall Street’s activities in helping Greece do derivatives deals.

He stopped short of saying an official inquiry of Goldman Sachs’ activities was under way by either the Fed or SEC. The SEC had no immediate comment when contacted.

“Obviously, using these instruments in a way that potentially destabilizes a company or a country is counterproductive,” Bernanke said. “We’ll certainly be evaluating what we learn from the activities of the holding companies that we supervise here in the U.S.”

Goldman Sachs spokesman Michael DuVally said, “As a matter of policy, we don’t comment on legal or regulatory matters.”