A Canadian union that successfully unionized one warehouse accused the company of closing its sites to fend off organizing efforts in the region.

Canada has warned Amazon.com that it is reviewing business ties with the company’s cloud-computing unit following Amazon’s decision to shut down its warehouses in Quebec, leading to the layoff of 1,700 workers.

E-commerce giant Amazon.com is exiting its operations in Quebec, leading to the loss of about 1,700 full-time jobs, a company spokesperson said on Wednesday. The online retailer will phase out operations across seven sites in the province—the only location in Canada with unionized Amazon employees —over the next two months.