A congressional panel investigating the origins of the 2007-2009 financial crisis said on Wednesday it issued a subpoena to Moody's, a major credit rating agency, "for failing to comply with a request for documents in a timely manner."

The Financial Crisis Inquiry Commission said in a statement: "In seeking documents and testimony from public agencies and companies, the commission has made it clear that it is committed to using its subpoena power if there is a lack of, or delay in, compliance."

It also said "failure to comply with a commission request is viewed with the utmost seriousness, as the commission will not be deterred from getting desired information."