Ukrainian border guards do not currently control more than 400 kilometers of their country's border with Russia, Ukrainian State Border Guard Service chief Viktor Nazarenko said at a press conference in Kyiv on Friday.

"As of today, we do not control 409.3 kilometers of our part of the Ukrainian-Russian border. This border segment is located totally on the territory of the Donetsk region and partly in the Luhansk region," he said.