Washington ? Responding to a Senate subpoena, the White House’s top lawyer ordered all employees in President Bush’s executive office to produce by May 31 any official documents related to contacts with Enron officials.

Presidential counsel Alberto Gonzales told the 2,000 or so employees in a memo Friday that they are required to make “a reasonable, diligent and good-faith search” of all official documents in their possession and to certify in writing that they have done so.

The Senate Governmental Affairs Committee has been seeking the information from the White House since late March as part of its Enron Corp. investigation. The panel issued subpoenas Wednesday to the offices of Bush and Vice President Dick Cheney to compel the turnover of relevant documents by noon on June 3.

Gonzales also had asked 204 White House staffers to fill out a questionnaire concerning contacts with Enron officials.