(CNN) More than 228,000 pounds of Hormel Spam and other canned meat products are being recalled because they might contain shards of metal, according to the US Department of Agriculture.

The department's Food Safety Inspection Service said Saturday that the problem was discovered after four customers complained of metal objects in canned Hormel products. The FSIS did not say how the pieces of metal might have gotten into the products.

Throughout the US, 12-ounce metal cans labeled "SPAM Classic" with the designation "EST. 199N" should not be eaten because of a risk of minor oral injuries, FSIS said. The cans have a "Best By" date of February 2021 and carry the following production codes: F020881, F020882, F020883, F020884, F020885, F020886, F020887, F020888 and F020889.

Possibly contaminated cans of meat were also distributed in Guam. These 12-ounce metal cans contain "Hormel Food Black-Label Luncheon Loaf." The recalled cans are marked "Best By" February 2021 and carry the production codes F02098 and F02108.

The products should be immediately thrown away or returned to the place of purchase, FSIS said. In a statement, Hormel said it was recalling the products "out of an abundance of caution," and that "the health and safety of consumers is our top concern."

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