Secretary of the National Security and Defense Council of Ukraine Oleksandr Turchynov says the Russian General Staff has changed the tactics of waging war in Donbas.

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"I want to emphasize that the tactics of war in Donbas, which is being implemented by the Russian General Staff, have changed. The two army corps belonging to the 8th army are carrying out functions similar to those performed by [the Soviet] penal battalions amid the Second World War," Turchynov said during the panel discussion at an expert forum in Kyiv, an UNIAN correspondent reported.

"Their main task is to block the advance of our troops at the cost of their own lives before the arrival of the [enemy's] main forces," he said.