Halliburton in Antitrust Probe

Halliburton Co., the world’s second-biggest oil field services provider, said the Justice Department was investigating possible antitrust violations involving the former chairman of its Kellogg, Brown & Root unit.

Halliburton said in a filing Tuesday with the Securities and Exchange Commission that a previously disclosed investigation into possible improper payments to Nigerian officials uncovered information suggesting that A. Jack Stanley and other former employees might have engaged in coordinated bidding with competitors on foreign construction projects.

Halliburton spokeswoman Wendy Hall said the company didn’t believe that there were any antitrust violations or that current management was involved. A lawyer representing Stanley couldn’t be reached for comment.