Federal food regulators raised their alarm for recalled eggs sold from Costco stores over possible salmonella exposure, reclassifying the targeted product to their highest risk level. The FDA had previously announced on Nov. 27 that about 10,800 retail units of organic, pasture-raised, 24-count eggs, sold under Costco’s Kirkland Signature brand, were being recalled by New York-Handsome Brook Farms. But then in an updated notice issued on Friday, the FDA reclassified to recall to a Class I, which the agency calls a “reasonable probability that the use of, or exposure to, a violative product will cause serious adverse health consequences or death.” The targeted egg cartons were sold in 25 Costco stores in Alabama, Georgia, North Carolina, South Carolina and Tennessee beginning Nov. 22. Health Dec 12 Two cats suspected of contracting H5 bird flu die after drinking recalled raw milk in California, officials say Recalls Nov 22 Why are there so many food recalls right now? Experts share tips to stay safe The “Organic Pasture Raised” eggs, sold in sets of 24, have a Universal Product Code (UPC) of 9661910680 with a use-by date of Jan 5, 2025. Customers with these eggs should return them to Costco for a full refund, the FDA said. This story first appeared on NBCNews.com. More from NBC News: Starbucks barista strike expands as workers demand pay raises Whooping cough cases reach highest level in a decade Key warning signs about bird flu are all going in the wrong direction