Hundreds of containers of a Minnesota supermarket company's dipping sauce were recalled due to potential mold growth contamination, according to the Food and Drug Administration (FDA). Lunds & Byerlys, an upscale supermarket chain, voluntarily recalled about 500 containers of its L&B Lone Star Dip, the FDA announced on Friday. The recalled sauce was sold at Lunds & Byerlys' stores throughout the Twin Cities and surrounding area, the federal agency said. No illnesses have been reported to date in connection with the recall. USA TODAY contacted Lunds & Byerlys on Monday but has not received a response. Store employees first noticed the possible contamination and subsequently reported the issue to Lunds & Byerlys' quality assurance team, the FDA said. If a customer recently bought the L&B Lone Star Dip, the FDA is encouraging them to "return it to any Lunds & Byerlys for a full refund (no receipt required) or destroy the product immediately." The dip is typically used on a sandwich, wrap or with Lunds & Byerlys tortilla chips, according to the supermarket's website.How was the potential mold contamination found?