On Friday, the Russian Defense Ministry said that the Ukrainian military had deliberately killed more than 10 captured Russian servicemen, shooting them in the head at point blank.
"Of course, Russia will search for those who committed this crime on its own. They must be found and punished," Peskov told reporters.
Russia is ready for an international investigation into the murder of Russian prisoners of if there is hope for the probe's effectiveness, otherwise, it makes no sense, the official added.
Earlier on Monday, The New York Times has confirmed that videos circulating online of more than ten Russian Prisoners of War (PoW) getting executed by Ukrainians were filmed in the village of Makeyevka at the time of its recapture by the Ukrainian forces
The Russian Investigative Committee opened a criminal investigation on Friday into the execution of Russian POWs by the Ukrainian military. The committee said that Russian military investigators were also taking measures to identify individuals who captured the footage of the execution.
UN Spokesperson Farhan Haq said on Friday that the United Nations was calling for a full investigation of all reported human rights violations in the context of more than 10 brutally executed Russian PoWs by the Ukrainian side.
Russia has sent a letter to UN Secretary-General Antonio Guterres on the issue of inhumane treatment of Russian PoWs by Ukraine and asked the top official to circulate it as an official document of the UN Security Council and General Assembly.