Amazon (AMZN - Get Report)  is shuttering all 87 of its U.S. pop-up stores as the company continues to retool its brick and mortar strategy, according to a published report Wednesday. 

The shops tend to be on the small side, typically occupying small spaces in malls, Whole Foods and Kohl's (KSS - Get Report) retailers across the country. The company touts its pop up shops as having "online prices, in-store convenience."

Amazon confirmed the closings, The Wall Street Journal reported, citing a company spokesperson.

It was recently reported that the company is looking to open up a chain of grocery stores separate from its Whole Foods brand. The first store is expected to open sometime later this year. 

Amazon is expanding its bookstores and 4-star stores, which sell products rated four stars or higher by Amazon customers. 

The company has been experimenting with pop-up stores since at least 2014. The company has reportedly been informing employees and partners that it would close the stores by April 29th. Workers will receive severance pay if they stayed until the end of April, employees told the Journal. 

Amazon and Kohl's are key holdings in Jim Cramer's Action Alerts PLUS charitable trust

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