MINNETONKA, Minn. (KTLA) -- More than a million eggs distributed to 34 states, including California, have been recalled after tests showed some of the eggs could be contaminated with listeria.

Minnesota food company Michael Foods said Friday it is recalling more than a million hard-cooked eggs sold for institutional use.

The Food and Drug Administration said the eggs were produced at the company's plant in Wakefield, Neb. Officials said the eggs were bought by food distributors and manufacturers and not sold directly to retailers.

There have been no reports of illness connected to the eggs, according to the FDA.

Lab testing by a third party revealed that some eggs may have been contaminated and the company determined that a repair project in a packaging room was the likely source of contamination.

Listeria can cause serious and sometimes fatal infections in young children, elderly people and others with weakened immune systems. Healthy people may suffer only short-term symptoms such as high fever, severe headache, stiffness, nausea, abdominal pain and diarrhea.

The eggs are sold under six brand names: Columbia Valley Farms; GFS; Glenview Farms; Papetti's; Silverbrook; and Wholesome Farms.

The states included in the recall include: Alabama, Arkansas, Arizona, California, Colorado, Florida, Georgia, Iowa, Illinois, Indiana, Kansas, Kentucky, Louisiana, Michigan, Minnesota, Missouri, Mississippi, Montana, North Carolina, North Dakota, Nebraska, New Jersey, Nevada, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Washington, Wisconsin, and West Virginia.