Safeway workers in several Colorado cities entered the third day of labor strikes Tuesday against Safeway and Albertsons over alleged unfair labor practices, with picketing in Grand Junction prompting a temporary store closure.

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.

The officials of the United Food and Commercial Workers are deliberately isolating different sections of grocery workers to keep a national movement from emerging.