The strike is due to begin on April 6, if an agreement between the Finnish Forest Industries Federation and Pro has not been reached until then. The action is scheduled to last until April 20.The strike will concern approximately 1,000 employees, and according to Pro the action will stop UPM's activities in Finland.Pro recently canceled the collective agreement between itself and the Finnish Forest Industries Federation. The agreement will become invalid on April 1. The background to the conflict is that the discussions between Pro and The Forest Industries Federation regarding this year's salary increases have stalled.