Ukrainian troops fighting in the Luhansk region, Jan 2015
BBC: Ukraine conflict: Deadly flare-up on eastern front line
Ukraine says its troops on the eastern front line have come under heavy shelling during a rebel attack, with one soldier killed and four wounded.
It says four rebel soldiers were killed and six injured.
Russian-backed rebels say Ukrainian forces tried to break through their lines and got caught in a minefield, with two killed and three wounded.
Ukraine's President Volodymyr Zelensky said the rebel "provocation" would not derail Kyiv's course to achieve peace.
The violence puts new pressure on a shaky ceasefire deal.
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More News On The Ukraine War
Fighting flares in eastern Ukraine, Kiev and rebels blame each other -- Reuters
Ukrainian soldier killed, several wounded in Donbass flare-up -- Al Jazeera
Soldier killed as violence flares-up in eastern Ukraine -- Euronews/AFP
Heavy fighting erupts in separatist-held eastern Ukraine -- The Telegraph
Ukraine, Russia-Backed Separatists Trade Accusations Over Latest Deadly Clashes -- RFE