Tesla is facing pressure from striking suppliers' workers in Sweden.

Stockholm (Reuters) - Tesla is facing increasing pressure in Sweden from a union supporting mechanics, demanding a collective bargaining agreement with the American automaker, as one of its suppliers' workers is set to go on strike next week.

Tesla does not have a manufacturing plant in Sweden, but its electric cars provide maintenance services in workshops across the country. Around 130 mechanics from the Swedish union IF Metall went on strike on October 27th.

Dock workers and car dealers quickly joined their ranks, refusing to handle Tesla products.

Norwegian aluminum company Norsk Hydro's subsidiary Hydro Extrusions spokesman said about 50 union workers will halt production of Tesla car products next Friday. The spokesman added that the remaining parts of the factory in Vetlanda will continue to operate.

Hydro Extrusions' Vetlanda factory produces aluminum profiles - transforming aluminum alloy into shapes, and is the first Tesla supplier in Sweden to support the mechanics' strike.

Tesla did not immediately respond to a request for comment.

The union said the automaker informed IF Metall on November 6th that it did not want to sign a collective agreement.

IF Metall spokesperson Jesper Pettersson said, "We hope Tesla Sweden signs a collective agreement...We hope this conflict can be as short as possible."

German unions are pressuring the automaker to implement a similar agreement for its 11,000 workers in Gruenheide near Berlin.

Earlier this month, the company raised wages by 4%, but German union IG Metall claims that wages are still around 20% lower than what is stipulated in the collective agreement.