You're reading: International Business Times: Russian-backed separatists, government forces exchange artillery fire, threatening uneasy truce in eastern Ukraine

Ukrainian government forces and pro-Russian separatists exchanged artillery fire in contested eastern Ukraine this weekend in the most pronounced military escalation since the two sides reached a ceasefire agreement in February. The renewed clashes cast doubt over the truce's long-term viability in a conflict that has killed more than 6,000 people and displaced hundreds of thousands of civilians since it began in April 2014.

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