Workers at certain Safeway and Albertsons locations will begin striking on Sunday, in protest of what workers say are unfair labor practices, short-staffed stores, and frozen wages.

United Food and Commercial Workers Local 7 announced Saturday that, unlike the February strike by King Soopers workers, the Safeway/Albertsons walkout will begin on a more limited scale.

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