Chicken nuggets produced by the world’s largest meat processor have been recalled due to concerns about rubber contamination.

Tyson Foods has recalled over 36,000 lbs of chicken nuggets in the US after “a small number of customers” reported that they had found “small pieces of soft, blue rubber” in the nuggets.

The recall includes 5 lb bags of the brand’s panko chicken nuggets purchased since 26 November 2018 and shipped to Arizona, California, Illinois, New Jersey and Utah.

Officials said that while there have been no confirmed reports of “adverse reactions” from consuming the nuggets, they are worried that some bags affected by the recall may still in in customers home freezers.

The Food Safety and Inspection Service said: “Consumers who have purchased these products are urged not to consume them. These products should be thrown away or returned to the place of purchase.”

The recall marks the second national recall of chicken nuggets in a week in the US. Another processor, Perdue Farms, announced that it would be recalling approximately 16,000 lbs of chicken nuggets sold in 13 states.

The brand announced that the items were produced with the wrong back panel label, which had incorrectly stated that they did not contain a milk allergen.

Jeff Shaw, Perdue’s vice president for quality assurance, said: “After receiving a customer inquiry, we conducted a comprehensive investigation and have isolated this to an error during a specific time frame of the production run of the nuggets.”

He added that the decision to recall was out of “abundance of caution” for Perdue’s customers.