COPENHAGEN, Denmark — The labor conflict against Tesla in Sweden is spreading to neighboring Denmark where transport workers with the country’s largest trade union said Tuesday that they will take action in solidarity with Swedish workers against the Texas-based automaker.

Swedish workers want the nonunionized carmaker to sign a collective bargaining agreement, which most employees in Sweden have. Tesla has no manufacturing plant in Sweden but has several service centers.

The United Federation of Workers in Denmark said there had been speculation that Tesla would deliver its cars to Danish ports and transport them on trucks to Sweden after Swedish dock workers blocked the reception of Tesla cars there.