An allergic reaction to Gia Russa whole grain bread crumbs prompted a recall when testing confirmed the product contained walnuts and pecans that weren’t noted on labels, the FDA announced.

After a customer complained to ICCO Cheese Company, the business investigated and learned through third-party testing that the product included the allergens. “The source of the tree nut allergen is believed to be the bread used by a supplier of the bread crumbs used by ICCO to repack the product,” the FDA says in its announcement.

The recalled products distributed to stores nationwide are 10-oz. cans of Gia Russa unseasoned (UPC 0-26825-01853-2) and Italian-seasoned (UPC 0-26825-01854-9 ) whole grain bread crumbs with best by dates printed on the bottom as 08/21/2019, 09/21/2019, 10/04/2019, 11/09/2019, 11/12/2019 and 12/05/2019.

The allergic reaction was the only one reported at the time of the recall announcement.

People with a tree nut allergy or severe sensitivity should not eat the bread crumbs because they could cause a serious or life-threatening reaction, the FDA says. People can return the bread crumbs to the store for a refund.

Anyone with questions can call Gia Russa at 888-794-3426, 9 a.m.-4 p.m. EDT, Monday-Friday.