Briefly

Berkshire Hathaway Inc., the insurance and investment company controlled by Warren Buffett, said Friday that U.S. regulators might sue Joseph Brandon, head of its reinsurance unit, as part of an industrywide accounting probe.

The Securities and Exchange Commission is trying to determine whether the reinsurance unit, General Re, helped American International Group Inc. use reinsurance contracts to distort its finances. The probe triggered the ouster of AIG Chief Executive Maurice “Hank” Greenberg in March and forced the company to cut profit for the last five years by $3.9 billion.

Brandon wasn’t available for comment.