Berks Packing is recalling hundreds of pounds of beef products that may have been incorrectly labeled, according to the U.S. Department of Agriculture.
The 1,320 pounds of beef knockwurst links may contain pork and the additive erythorbate, officials said.
The Reading-based company produced the links on Nov. 12, 2015. A sell-by date of March 11, 2016, is printed on the one-pound package, which also bears establishment number "EST. 8782" inside the USDA mark of inspection.
The knockwurst was shipped to retail locations in Pennsylvania, New Jersey, Maryland, New York, West Virginia, Virginia, and Delaware.
Anyone who bought the recalled packages should throw them away or return them to the place of purchase, officials said.
There have been no confirmed reports of adverse reactions due to people eating the links, the USDA said.