Amazon.com Inc.’s decision to close all seven of its warehouses in the Canadian province of Quebec and terminate more than 1,900 workers is prompting legal action from the affected union.

A union that represents some Montreal Amazon workers said it will petition a court to compel the company to reopen the warehouses and reverse the job cuts.

After Amazon announced it would shutter its Quebec warehouses, costing 1,700 workers their jobs, a Canadian union said it would strike back.

The union representing Amazon workers at a warehouse that was shut down last month is calling for a boycott and preparing a legal challenge against the company. "This is not the way we do business in Quebec,

Unions had gained a foothold in one of the company’s warehouses in the province, though Amazon would not say if there was a connection.

The online retail giant said the move was not linked to recent unionization efforts by workers in the Canadian province.

In addition to the roughly 2,000 employees laid off by Amazon after the company announced it would be closing its Quebec warehouses, more than 2,500 other people employed by smaller carriers subcontracted by the company have also lost their jobs.

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.