Over 6.5 million boxes of every kid’s favorite dinnertime meal, Kraft Macaroni & Cheese, is being recalled due to the possibility they may contain small fragments of metal, Kraft Foods Group announced in a press release.

The company is recalling the food after eight customers said they found pieces of metal mixed in. No injuries were reported. Kraft sent out a voluntary recall of about 242,000 cases of 7.25-ounce boxes with “best when used by” dates of Sept. 18, 2015 to Oct. 11, 2015. Below those dates, the boxes should also include a code, “C2,” which refers to the particular production line the food was made on — the company didn’t specify how the metal got into the boxes. The recall applies to all boxes of the original flavor with these markers, regardless of whether they’re packaged individually or in 3-, 4-, or 5-packs.

“We deeply regret this situation and apologize to any consumers we have disappointed,” the company said in the release.

In the release, Kraft said anyone who bought the products can return them to the store where they were purchased for an exchange or full refund. It also emphasized that those who have these products should not eat them. The products were shipped throughout the United States as well as to Puerto Rico, and some Caribbean and South American countries. None were shipped to Canada.

The recall has already affected the company’s shares, which were down 1.70 percent at $60.65 as of the time of this report. Kraft has seen its share of the packaged macaroni and cheese market dwindle lately, as other, healthier options compete for space. According to Reuters, it held 78 percent of the market in March 2014, down from 82 percent in March 2010.

Any consumers who wish to contact Kraft’s consumer relations may do so at 1-800-816-9432 between 9 a.m. and 6 p.m. ET.