The USDA says an investigation by its Food Safety and Inspection Service of 24 illnesses in multiple states prompted the company to re-examine its food safety system. The department says 18 of the illnesses appear to have the same cause, and the company is conducting the recall "out of an abundance of caution."
The USDA didn't immediately have an update Sunday of what states had reported illnesses or received beef products covered by the expanded recall. But the earlier recall covered products that were made April 21-22 and shipped to Arizona, California, Colorado, Florida, Illinois, Michigan, Minnesota, Nebraska, Oregon, South Carolina, Tennessee, Utah and Wisconsin.

