Local farmers sold the chickens to Shandong Liuhe Group and Yingtai Co., which claim to be suppliers for KFC.
The report has triggered nationwide concerns over the safety of KFC's chicken. The chain has about 300 stores in Shanghai, which receive a great deal of raw chicken from Shandong.
The Shanghai Food and Drug Administration said it has taken 32 samples of raw chicken products from a logistics center belonging to Yum Brands Inc., KFC's parent company, in Shanghai.
According to the administration's probe, the logistics center's purchase records do suggest that the Shandong Liuhe Group was a supplier, although no purchases were made from the supplier after May.
Beijing-Zhengzhou high-speed railway to start service on Dec. 26