Locomotive engineers returned to work Monday at ArcelorMittal Kryvyi Rih, the nation’s largest steelmaking plant.

A four-day strike ended due a combination of ArceloMittal raising salaries and the government threatening to send in its own engineers and locomotives, Interfax-Ukraine reports. A company press release said: “The enterprise is preparing for the gradual restoration of the full metallurgical cycle and operation of all units.” The company also appealed to workers to resist future strike calls made “in the interests of individual politicians.”