Walmart (WMT) is closing dozens of Sam's Club stores nationwide, according to numerous media reports.

The retail giant announced late Thursday that it will shutter 63 of the stores, where member customers can buy products at discounted prices. Walmart said it will convert up to a dozen of those clubs into fulfillment centers for online orders. The other stores will be closed in the coming weeks.

"We know this is difficult news for our associates, and we are working to place as many of them as possible at nearby locations," Sam's Club CEO John Furner said in a statement.

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Walmart said it will provide support and resources for workers who are laid off, including 60 days pay and severance to eligible employees.

The closures affect stores in Alaska, New Jersey, upstate New York, Georgia, Illinois, Indiana, Ohio, Louisiana, North Carolina, Tennessee and Texas. In some locations, per social media, people showed up to work only to be told that their location was closing, with nearly no advance notice.

"Change is never easy, but we're making these decisions as part of running a healthy business," Furner said.

Sam’s Club shutdown? Employees at this S Loop store tell me they showed up to work and were told store is closed effective today. Sign on door says same thing. Hearing other stores also affected. Waiting on answers from parent company, Walmart #khou11 pic.twitter.com/RtbY7EhiIK — Jason Miles (@JMilesKHOU) January 11, 2018

The chain, which competes with Costco (COST), has more than 650 locations employing more than 100,000 people, with an average of 175 employees per store, according to the company.

Walmart will have 597 Sam's Club stores after the restructuring is complete.

The company drew criticism from people on Twitter who objected to the lack of notice about the closings.

My problem isn't with you closing stores. It's closing stores without telling the employees. How would you, as a social media rep, like to come in to work tomorrow and find out you were fired? — YourMCAdmin (@YourMCAdmin) January 11, 2018

The closures come on the same day that Walmart announced it was raising its minimum wage to $11 per hour.

Same day Walmart raises worker wage to $11 "due to tax bill", Sam's Club announces 419 Hoosier workers are losing their jobs. — Stephen Terrell (@StephenTerrell) January 11, 2018

On Thursday, the company was offering refunds on memberships as well as free 3-month extensions.