Workers at three of the four snack cake plants operated by Hostess Brands L.L.C. have voted to unionize, according to the union representing the bakery workers.

The three plants are located in Indianapolis; Schiller Park, Ill.; and Columbus, Ga. The votes to unionize at the plants were confirmed by a spokesperson for the Bakery, Confectionery, Tobacco and Grain Millers International Union July 17. The spokesperson declined to elaborate further on the vote.

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