First Deputy Prosecutor General of Ukraine Dmytro Storozhuk said this at the briefing, an Ukrinform correspondent reports.
"We once again confirmed the armed aggression of the Russian Federation against Ukraine. The investigation established a person who had directly led the ‘DPR’ militants in the war against the Ukrainian Armed Forces," Storozhuk said.
According to him, the materials were given to the Ukrainian delegation to the International Court of Justice as the evidence of Russian aggression against Ukraine.
As reported, 12 people were killed and another 18 were injured in a terrorist attack near the town of Volnovakha, Donetsk region, on January 13, 2015.