Publix is recalling all lots of its GreenWise Organic Whole Blueberries and Whole Mixed Berries sold across eight states over concerns they may be contaminated with E. coli, expanding an earlier recall tied to a single lot of frozen blueberries.

The Lakeland, Florida-based grocery chain said Wednesday it is voluntarily recalling all lots of the frozen fruit products “out of an abundance of caution” after public health officials’ trace back and epidemiological investigation linked them to a multistate E. coli O145 outbreak.

The recalled products were distributed to Publix stores in Alabama, Florida, Georgia, Kentucky, North Carolina, South Carolina, Tennessee and Virginia. 

The company said it implemented an internal stop sale at the end of June, and the products remain unavailable for purchase.

The expanded recall follows a July 3 recall by Chilean supplier Frutas y Hortalizas del Sur S.A. involving a single lot of GreenWise Organic Blueberries. Publix said it broadened the recall to include all lots of GreenWise Organic Whole Blueberries and Whole Mixed Berries based on information gathered during the ongoing public health investigation.

Customers are being urged not to consume the recalled products and should either throw them away or return them to any Publix store for a full refund. The affected products are GreenWise Organic Whole Blueberries in 10-ounce packages (UPC 41415-06453) and 48-ounce packages (UPC 41415-12053), along with GreenWise Organic Whole Mixed Berries in 10-ounce packages (UPC 41415-06753) and 48-ounce packages (UPC 41415-12153).

According to the Food and Drug Administration, Escherichia coli O145:H28 is a Shiga toxin-producing strain of E. coli that can cause severe stomach cramps, diarrhea that may be bloody and vomiting. While most healthy people recover within about a week, some infections can lead to hemolytic uremic syndrome, a potentially serious complication that is more likely to affect young children, older adults and people with weakened immune systems.

FOX Business reached out to Publix for additional comment, including whether any illnesses have been linked to products sold at its stores and what prompted the company to expand the recall to all lots. Publix did not immediately respond.

Customers with questions can contact Publix Customer Care at (800) 242-1227 from 8:30 a.m. to 5 p.m. ET Monday through Friday. Additional information about the outbreak investigation is available through the Centers for Disease Control and Prevention.

Publix, the largest employee-owned company in the U.S., operates more than 1,400 stores across Alabama, Florida, Georgia, Kentucky, North Carolina, South Carolina, Tennessee and Virginia.