A Nebraska meatpacker recalled more than 40,000 pounds of ground beef products distributed in 16 states after a test confirmed the presence of E. coli. The U.S. Department of Agriculture issued the warning on Friday.

Tyson Fresh Meats Incorporated of Dakota City, Nebraska recalled 10-pound chubs of chuck fine ground beef 80/20, packed in cases containing eight chubs.

USDA’s Food Safety and Inspection Service said in a statement that the problem was discovered through routine monitoring that confirmed a positive result for E. coli. No reports of illness have been received.