Amazon-owned Whole Foods is asking the National Labor Relations Board to set aside the results of a union election that led to a labor win.

Amazon, which purchased Whole Foods Market in 2017, has filed objections to last month's successful union election.

The union win, at a Philadelphia store where workers are seeking higher wages, comes as Amazon is also fighting organizing efforts among some warehouse employees and delivery drivers.

Workers at a Whole Foods Market in Pennsylvania voted to unionize on Monday, becoming the first group of employees to pull off a labor win at the Amazon-owned grocery store chain. Employees at the Philadelphia store cast 130 votes — or about 57% of the ballots cast — in favor of joining a local chapter of The United Food and Commercial Workers

Last month, workers at a Whole Foods store in Philadelphia voted in favor of joining the United Food and Commercial Workers Union.