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Ukraine's military said on Saturday there had been a significant decrease in attacks by pro-Russian separatists in the east overnight, but said rebels had fired GRAD missiles at the town of Avdiivka despite a two-week-old ceasefire deal. On Friday, Ukraine reported the first deaths among its servicemen in three days, underscoring the fragility of the truce meant to have taken effect on Feb. 15, as government troops and rebels pulled back heavy weapons from the frontline. The Ukrainian military reported isolated attacks by rebels on government positions, including strikes from GRAD missiles around government-held Avdiivka, north of rebel-held Donetsk and home to one of Europe's largest coke plants. Fighting in Ukraine's industrialized east has devastated the steel sector, which before the conflict erupted last April accounted for 15 percent of the economy.