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.

The union workers of Kroger-owned King Soopers grocery stores in the metro Denver, Boulder, Parker and Broomfield bargaining units voted to go on strike, the union announced

King Soopers and City Market employees in Colorado could strike after their union contract with Kroger expired last week.