About 600 workers are on strike at the Frito-Lay plant in Topeka after union workers rejected a proposed contract that had been recommended by union leadership.

Workers said the main points of contention are small pay increases and employees being forced to work hours of overtime, The Topeka Capital-Journal reported.

The workers are represented by Local 218 of the Bakery, Confectionery, Tobacco Workers and Grain Millers union.

Frito Lay and union leaders reached a two-year agreement that included across-the-board wage increases both years of the contract, and improved work rules that would have reduced overtime and hours worked.

Workers voted to reject the contract.

Frito-Lay is one of seven divisions of New York-based PepsiCo.

The company said in a statement that – because the union leadership recommended the contract – it does not anticipate any further negotiations “for the foreseeable future.”

PepsiCo said the plant would continue to operate, and it had a plan to ensure employee safety.