His words are quoted by RIA Novosti.
As Marochko said, west of Kremennaya, after fire contact with the Russian Armed Forces, the Ukrainian Armed Forces left their positions and attempted to retreat to secondary positions.
“However, heavy small arms fire was opened from these positions,” he said.
Marochko added that about ten Ukrainian Armed Forces soldiers were killed as a result of “friendly fire.”
Earlier, Marochko said that members of the National Guard of Ukraine opened fire on soldiers from the 67th separate mechanized brigade of the Ukrainian Armed Forces, who were trying to leave their positions in the area of the village of Serebryanka.