Amazon will lay off approximately 400 workers in Washington state as part of its decision to close all Amazon Go and Amazon Fresh stores across the country, according to a notice filed with the state Employment Security Department on Wednesday.

Amazon Go, equipped with the cashierless Just Walk Out system, was heralded as a marvel when the first location opened to the public at Amazon’s Seattle headquarters building in 2018. Efforts to deploy the expensive array of ceiling-mounted cameras and sophisticated software to full-sized Fresh and Whole Foods stores were a bust.

The company announced in a blog post on Wednesday that it is shutting down both its grocery and automated grab-and-go convenience stores, Amazon Fresh and Amazon Go, marking the end of yet another failed experiment to crack brick-and-mortar retail.

The e-commerce giant wants to take on giant brick and mortar rivals with a 229,000-square-foot location south of Chicago, but its strategy will also hurt local retailers.