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.

Local 7 said on Thursday that King Soopers employees of Metro Denver, Boulder, Parker and Broomfield voted to approve a strike regarding alleged Unfair Labor Practices.

Both the president of King Soopers and the union that represents the supermarket chain’s employees believe a strike is likely after union negotiators rejected the company’s contract offer. That’s where the agreement ends.