CHICAGO, ILLINOIS, U.S. — Archer Daniels Midland Co. said it is voluntarily recalling additional flour, extending its initial recall announced in May and June that was linked to its flour mill in Buffalo, New York, U.S.

ADM said it is recalling all flour produced with the same hard red wheat source that was used in two production lots that tested positive for E. coli. The lots were manufactured on Dec. 9, 2018, and Dec. 21, 2018, at the Buffalo mill, the U.S. Food and Drug Administration said.

The E. coli strain matches the one previously found in flour produced at ADM’s Buffalo mill.

“We are in the process of notifying all retail, large pack and bulk customers that are impacted and are working with them to ensure product is removed from shelves and consumers are appropriately notified,” ADM said. “Food safety is our first priority, and we have a long track record of providing high-quality, safe ingredients. We are working closely with regulators throughout this process.

“The flour milling process involves grinding and processing wheat, which is a raw agricultural commodity that is grown under a wide range of environmental conditions. ADM reminds customers and consumers that flour is not ready-to-eat and must be thoroughly cooked before eating to prevent illness from possible bacteria in the flour. Do not eat or play with raw dough, and wash hands, utensils and surfaces after handling. Any consumers concerned about an illness should contact a physician.”