A Russian military officer, involved in the killing of civilians in the village of Hroza, Kupiansk district, Kharkiv region, is now in critical condition following an explosion, reported the Main Directorate of Intelligence of the Ministry of Defense of Ukraine. The explosion occurred on January 3 in the settlement of Shuya, Ivanovo region, Russia. Captain Konstantin Nagaiko, the battery commander of the rocket division of the 112th tank brigade of the 1st tank army of the Western Military