A criminal case has been opened over the violation of the laws and customs of war combined with premeditated murder," Kostin posted on X."We are doing our utmost to identify and prosecute all those responsible for the aggressor's crimes committed against Ukraine and Ukrainians." The shootings are said to have occurred on Oct. 10, the crowd-sourced monitoring group Deepstate reported on Oct. 13, citing sources in Ukraine's First Tank Brigade.Ukraine's Obudsman Dmytro Lubinets said that he had submitted information about these cases to the U.N. and the International Committee of the Red Cross.  Summary executions by Russians of Ukrainian prisoners of war have sharply risen in the past year.Kyiv knows of 93 Ukrainian POWs who were summarily executed by Russian soldiers on the battlefield throughout the full-scale war, a senior representative of the Prosecutor General's Office said on national television on Oct.