Minnesota: Amazon.com Inc. warehouse workers in Minnesota plan to strike during the online retailer’s summer sales extravaganza, a sign that labour unrest persists even after the company committed to paying all employees at least $15 an hour last year.

Workers at a Shakopee, Minnesota, fulfilment centre plan a six-hour work stoppage July 15, the first day of Prime Day. Amazon started the event five years ago, using deep discounts on televisions, toys and clothes to attract and retain Prime members, who pay subscription fees in exchange for free shipping and other perks.

“Amazon is going to be telling one story about itself, which is they can ship a Kindle to your house in one day, isn’t that wonderful,” said William Stolz, one of the Shakopee employees organising the strike. “We want to take the opportunity to talk about what it takes to make that work happen and put pressure on Amazon to protect us and provide safe, reliable jobs.”

Amazon, through a spokeswoman, declined to comment on the planned strike.