Four Ukrainian servicemen have been killed and another 14 have been injured in the Ukrainian army operation area in the country's eastern regions over the past 24 hours, the Ukrainian presidential administration's spokesman for the army operation Oleksandr Motuzianyk has said.

"Four of our soldiers have been killed and another 14 have been injured as a result of fighting in the past 24 hours," he told a press briefing in Kyiv on Thursday.