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Ukraine soldiers killed in Sloviansk clashes

5 May 2014 Last updated at 23:41 BST

Four Ukrainian soldiers have been killed and an army helicopter shot down by pro-Russian militants near the eastern city of Sloviansk, Kiev says.

It says the gunmen used heavy weapons against Ukraine's units involved in the "anti-terror" operation. Casualties were also reported among the rebels.

Fergal Keane reports from Sloviansk.