FSIS is concerned that some product may be frozen and in freezers at food service institutions and could be served. The FSIS also said that the products already purchased must be thrown away.
The USDA says the problem was discovered Friday when Tyson reported that its breading supplier was recalling the breading because of the possible contamination. That was because the ready-to-eat breaded chicken products contained milk, an allergen that wasn't declared on the product label.
There have been no confirmed reports of adverse reactions due to consumption of these products. Tyson Foods said Monday, March 6, 2017, a strain of bird flu sickened chickens at a poultry breeder that supplies it.
NASA robot finds 'building blocks for life' on Mars
The discovery, published on Thursday by the journal Science , is longtime in the making. Organic molecules containing chlorine were detected on Mars before.
The products being recalled were not available for purchase in retail stores.
The recall on Friday is much smaller than one issued by Tyson Foods nearly exactly one year ago.
This is not the first time such a recall took place for Tyson Foods.