REUTERS

"According to the latest information of the National Security and Defense Council, today two battalion task forces of the Russian Federation were spotted crossing the Ukrainian Russian border," a statement issued by the center reads.

As UNIAN reported earlier, the situation in the Donbas conflict zone remains difficult, according to Ukrainian officials.

Over the last day, Russian-backed militants have launched attacks using artillery and mortars on the settlements of Bohdanivka, Vuhlehirsk, Krasnohorivka, Kryakivka, Leninske, Mykolaivka, Novotoshkivka, Novgorod, Novotroitske, Oleksandrivske Orlovo-Ivanivka, Petrovske, Slovianoserbsk, Smile, Starohnativka, Tonenke, and Frunze. The most intense attacks were on Stanytsia Luhanska, Krymske and Troitske.