Workers at stores in metro Denver and other parts of Colorado could hit picket lines as early as Sunday morning.

Safeway and Albertsons union members are voting this week on whether or not to strike. The union UFCW Local 7R said meat and retail workers in the Front Range, including Denver, Arapahoe and Douglas counties,

The United Food and Commercial Workers Local 7 said union members working for Safeway and Albertsons grocery stores in Colorado have voted to strike after nine months of negotiations failed