WASHINGTON: A US Securities and Exchange Commission lawyer warned about irregularities at Bernard Madoff's financial management firm as far back as 2004, The Washington Post reported yesterday, citing agency documents and sources familiar with the investigation.

Genevievette Walker-Lightfoot, a lawyer in the SEC's Office of Compliance Inspections and Examinations, sent emails to a supervisor saying information provided by Madoff during her review didn't add up and suggesting a set of questions to ask his firm, the report said.

Several of the questions directly challenged Madoff activities that turned out to be elements of his massive fraud, the newspaper said.