The Apple retail workers in Towson, Maryland, voted 65-33 to seek entry into the International Association of Machinists and Aerospace Workers, the union's announcement said. The vote could not immediately be confirmed with the National Labor Relations Board, which would have to certify the outcome. An NLRB spokeswoman referred initial queries about the vote to its regional office, which was closed late Saturday.

Apple declined to comment on Saturday’s development, a company spokesperson Josh Lipton told The Associated Press by phone.

Union organizing in a variety of fields has gained momentum recently after decades of decline in U.S. union membership. Organizers have worked to establish unions at companies including Amazon, Starbucks, outdoors retailer REI and Google parent company Alphabet.