(ANSA-AFP) - GENEVA, NOV 15 - Prisoners held by both sides in Russia's war in Ukraine have been subjected to torture, including with beatings, electric shocks, and humiliating treatment while naked, UN investigators said Tuesday. Under international law, "the prohibition of torture and ill-treatment is absolute, even -- indeed especially -- in times of armed conflict," Matilda Bogner, head of the UN Rights Monitoring Mission, told reporters. She lamented that neither side in the war raging in Ukraine appeared to be adhering fully to that principle, although the ill-treatment of Ukrainian prisoners of war by Russian captors was more "systematic". Speaking via video link from Kyiv, she said the team of investigators, which has been present in Ukraine since 2014, had in recent months interviewed 159 prisoners of war -- all but 20 men -- held by Russia, and 175 prisoners -- all men -- held by Ukraine. While Ukraine gave access to the prisoners while in detention, Russia did not, and the Ukrainian prisoners of war could only be interviewed after their release, she said. (ANSA-AFP).