About 45,000 grocery workers have authorized a strike at Ralphs, Albertsons, Vons and Pavilions stores in Southern California to protest unfair labor practices.

Union members of the United Food and Commercial Workers (UFCW) in Southern California and the Pacific Northwest have voted this week to authorize a worker strike against Kroger and Albertsons stores, Supermarket News reported.

Indiana is the latest flash point in Kroger’s spreading labor unrest. Members of United Food and Commercial Workers (UFCW) Local 700 — representing roughly 8,000 clerks, meat-cutters, and pharmacy techs across central Indiana — rejected a tentative four-year agreement by a lopsided 74 percent margin.