The labor union and the management of Seoul Metro that operate subway lines one through eight reached an agreement on Wednesday morning just hours after the union began a three-day strike.

Seoul city said the two sides were able to reach an agreement following behind-the-scenes overnight negotiations.

The labor union launched the strike to call for an increase in the number of safety-related workers, the abolition of a wage-peak system and the implementation of a new shift system. 

Labor and management agreed to increases wages by one-point-eight percent, jointly ask Seoul city to increase the number of safety-related workers and to request that the Interior Ministry reexamine the wage-peak system. 

Seoul Metro mobilized substitute workers to keep train operations at normal levels during the morning rush hour.