Ukraine crisis: Barricades burn after commando raid
24 April 2014 Last updated at 14:18 BST
The Ukrainian government says its forces have moved on the eastern city of Sloviansk a pro-Russian separatist stronghold.
According to the interior ministry, three checkpoints manned by illegal armed groups were destroyed. It said at least five people it described as terrorists were killed.
BBC correspondent Oleg Boldyrev reports from the scene of the operation where he says the number of casualties is unclear.