The largest producer of fresh eggs in the U.S. said Tuesday it had temporarily halted production at a Texas plant after bird flu was found in chickens, and officials said the virus had also been detected at a poultry facility in Michigan.

Ridgeland, Mississippi-based Cal-Maine Foods, Inc. said in a statement that approximately 1.6 million laying hens and 337,000 pullets, about 3.6% of its total flock, were destroyed after the infection, avian influenza, was found at a facility in Parmer County, Texas.

The plant is on the Texas-New Mexico border in the Texas Panhandle about 85 miles (137 kilometers) southwest of Amarillo and about 370 miles (595 kilometers) northwest of Dallas. Cal-Maine said it sells most of its eggs in the Southwestern, Southeastern, Midwestern and mid-Atlantic regions of the United States.

Eggs that are properly handled and cooked are safe to eat, according to the U.S. Department of Agriculture.