Pro-Russian separatists
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Ukraine's President Poroshenko vows to act over deaths

12 July 2014 Last updated at 10:01 BST

The President of Ukraine, Petro Poroshenko, says his forces will find and destroy pro-Russian separatists who killed more than 20 Ukrainian troops in the east of the country.

The attack on government forces appears to be the most deadly since Mr Poroshenko ended a unilateral ceasefire last month.

Emily Thomas reports.

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