Union workers of King Soopers grocery stores in Colorado Springs have voted to authorize an Unfair Labor Practice strike.

The United Food and Commercial Workers Local 7 said union members in metro Denver and Boulder, Colorado, have voted overwhelmingly to authorize a strike against King Soopers. The timing and locations of strikes will be announced publicly before any labor action starts,

Some union employees at King Soopers have voted almost unanimously to authorize a strike. The grocery chain in Colorado is owned by parent company Kroger.