After multiple consumer complaints, the U.S. Department of Agriculture has issued a public health alert for some Wegmans chicken nugget products warning they may contain “extraneous material.” The frozen chicken nuggets were sold in Pennsylvania and seven other states, as well as the District of Columbia, according to a Jan. 27 notice.

The chicken nuggets “may be contaminated with extraneous material, specifically bone fragments,” the U.S. Department of Agriculture says.

The U.S. Department of Agriculture’s Food Safety and Inspection Service issued a public health alert on Monday for frozen, fully cooked Wegmans Food Markets breaded chicken breast nuggets due to possible contamination with bone fragments.