Some 1,400 Kellogg Company workers went on strike at all of the company’s U.S. cereal plants Tuesday.

The Bakery, Confectionery, Tobacco Workers and Grain Millers International Union said in a statement it’s seeking a “fair contract” for workers in negotiations with the company after the previous one expired at midnight Monday.

Work stopped at plants in Battle Creek, Michigan; Omaha, Nebraska; Lancaster, Pennsylvania; and Memphis, Tennessee — where iconic brands such as Rice Krispies, Raisin Bran, Froot Loops, Corn Flakes and Frosted Flakes are produced.

Union president Anthony Shelton accused Kellogg’s in the statement of demanding workers “give up quality health care, retirement benefits, and holiday and vacation pay.”... Read More: Axios