The US Department of Agriculture has informed food retailer Kroger that Nebraska Beef has been identified as the supplier of ground beef products linked to E. coli illnesses in Michigan and central and northern Ohio.

The illnesses were reported between 31 May and 8 June. The Centers for Disease Control and Prevention have not reported any additional illnesses related to this outbreak.

Kroger has expanded the voluntary recall initiated last week for Kroger stores in Michigan and in central and northern Ohio (Columbus and Toledo areas).

Based on the latest information from the USDA, Kroger is expanding the recall to include ground beef products in Styrofoam tray packages wrapped in clear cellophane or purchased from an in-store service counter from Fred Meyer, QFC and Kroger stores with sell-by dates between 21 May and 5 July.

Kroger is asking customers to carefully check the ground beef they have and any covered in the recall should be returned for a full refund or replacement.