WASHINGTON-- Banking regulators refused to commit Thursday to releasing details of their investigations into illegal foreclosure practices by the nation's largest banks.

Appearing before a Senate panel, Federal Reserve Chairman Ben Bernanke and acting Comptroller of the Currency John Walsh said they had not decided whether to release reports on illegal practices by individual banks.

Sen. Robert Menendez, D-N.J, had pressed them to release the reports, banks' individual action plans and agreements with the consultants that investigated the banks.

Menendez cited a report by the Associated Press this week that said banks are continuing to foreclose without doing the necessary paperwork, eight months after they had promised to stop.

"We will have to evaluate the individual documents and see if there is anything that would be of a confidential, supervisory nature," Walsh said, adding that his agency will release "some information."

Bernanke said the Fed plans to release a report that "will explain what the findings were and what the proposals were and what the reactions were." But he said he must consult with his legal team before releasing any information about individual banks.

Citing a legal opinion by his staff, Menendez said the regulators are permitted to release the information if doing so was in the public's best interest.

"It is not acceptable to violate the law, and it is not acceptable to do robo-signings," Menendez said.

Officials in at least three states say they have received thousands of mortgage documents with questionable signatures since last fall.