An Idaho-based company is recalling nearly 3,000 pounds of raw ground beef that may have been contaminated with E. coli bacteria.

The recall involves 16-ounce vacuum-sealed packages labeled “Forward Farms Grass-Fed Ground Beef.” Affected packages were produced Dec. 16 and have a label telling customers to use or freeze the meat by Jan. 13. The affected beef also bears the establishment number “EST 2083” on the side of its packaging.

The meat was produced by Heyburn, Idaho-based Mountain West Food Group and was shipped to distributors in California, Colorado, Idaho, Montana, Pennsylvania and Washington.

The U.S. Department of Agriculture’s Food Safety and Inspection Service, which announced the recall Saturday, didn’t say which retailers may have sold the meat. The USDA and Mountain West Food Group didn’t respond to messages left Tuesday by The Associated Press.

The USDA said there have been no confirmed reports of illness due to consumption of the meat. The issue was discovered in a sample of beef during routine testing.

The USDA said the type of E. coli found can cause illness within 28 days of exposure. Most infected people develop diarrhea, which is often bloody, and vomiting. Infection is usually diagnosed with a stool sample.

The USDA said customers who have purchased the affected products should either throw them away or return them to the place they were bought. The agency also advises all customers to consume ground beef only if it has been cooked to a temperature of 160 degrees Fahrenheit.