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.

The union representing Safeway store employees in Colorado has given the required 72-hour notice that the strike is set to begin one minute before midnight on Sunday.

Safeway employees across Colorado have been going on strike, one union after another. And Tuesday, the strikes reached Grand Junction.

They made good on that promise on June 15, joining the first cities to go on strike, including Fountain, Estes Park, and a Denver distribution center. Later in the day, workers from the Littleton Safeway also walked off the job,

Chronic understaffing at Albertsons and Kroger grocery stores has led to a near unanimous vote to strike in about 105 stores in Colorado – including 100% of the workers at the Salida Safeway store.