A worker stands near a shut down machine at the workshop Husi Food Co. in Shanghai. Pic: AP.

BEIJING (AP) — A U.S. meat supplier says a Chinese unit embroiled in a safety scandal has fallen short of its requirements for maintaining high standards.

The president of OSI Group, David McDonald, said Monday an investigation of complaints that its China unit, Husi Food, sold expired beef and chicken still is under way. McDonald declined to give details of what investigators have found.

At a news conference in Shanghai, McDonald said, “Our investigation has found issues that are absolutely inconsistent with our internal requirements for the highest standards, processes and policies.”

Restaurants including McDonald’s and KFC stopped using meat supplied by Husi after a Shanghai TV station reported last week the company repackaged and sold expired meat.

OSI said it will set up a food safety center in Shanghai.