MARIUPOL, Ukraine — Steelworkers from plants owned by Ukraine's richest man retook government buildings from pro-Moscow insurgents, reversing the tide of rebellion and lawlessness that has gripped this industrial port and dealing a setback to forces aspiring to merge with Russia.
Wearing overalls and hard hats, dozens of workers cleared away barricades of debris and tires outside the Mariupol city hall on Friday, scoring early successes against the pro-Russian forces, but threatening to open a new and dangerously unpredictable cycle of confrontation.
"People are tired of war and chaos. Burglaries and marauding have to stop," said Viktor Gusak, a steelworker who joined in the effort to banish the pro-Russia militants from Mariupol, the Donetsk region's second-largest city and the site of bloody clashes last week between Ukrainian troops and the insurgents.
About 75 miles to the north, armed backers of Ukrainian unity dressed in black seized control of a police station in a village just inside the troubled Donetsk region, vowing to expel the separatists.
The moves, which began Thursday in Mariupol and the village of Velyka Novosilka, were a blow to the separatists who have seized control of government offices in this city and a dozen others in the east.
In Mariupol, billionaire Rinat Akhmetov's Metinvest holding group organized citizen patrols of steelworkers working alongside police to help improve security and get insurgents to vacate the buildings they had seized.
Until now, Akhmetov, 47, had been notable for his noncommittal stance during the turbulence that has for more than a month gripped the region that is home to his most lucrative industrial assets.