"A war was raging there, and people went there to fight, they opened fire and participated in hostilities - this is the military sphere," Peskov said.

When asked whether Putin's words implied the presence in Donbas of volunteers rather than Russian military experts, Peskov replied "Yes."

Read alsoPutin’s new revelationsAs UNIAN reported earlier, speaking at a press conference held in Moscow yesterday, December 17, Russian President Vladimir Putin said that Russians were involved in the conflict in Donbas.

According to him, Russia has never denied that Russian citizens staying in Donbas were involved in "solution of certain issues, including those in the military sphere." However, he said that the Russian regular army was not involved in the conflict.

In turn, Ukrainian President Petro Poroshenko said Russian President for the first time publicly confirmed the presence of Russian troops in the east of Ukraine.