McDonald’s will be looking for a new source of eggs for many of its hugely popular Egg McMuffins.

The fast food company says it “will no longer accept” eggs from one of the country’s biggest egg companies, Sparboe Farms, that is the subject of an ABC News investigation to be broadcast Friday on “20/20” and “World News with Diane Sawyer” and was cited Thursday by the Food and Drug Administration for “significant…and serious violations” in the production of eggs.