U.N. condemns alleged abuse at Georgia prison September 21, 2012 -- Updated 1308 GMT (2108 HKT) Protesters rally against torture in prisons in Tbilisi on September 19, 2012. Office of the High Commissioner for Human Rights joins others in criticizing former Soviet republic Videos released this week purportedly show abuse at a prison, juvenile detention facility The U.N. asks Georgia to investigate all allegations of human rights abuses (CNN) -- The United Nations has added its voice to a chorus of condemnation of the former Soviet republic of Georgia after videos surfaced purportedly showing guards abusing prisoners. The Office of the High Commissioner for Human Rights called on the Georgia government to ensure that these allegations are "promptly, impartially and effectively investigated and that perpetrators are brought to justice," spokesman Rupert Colville said Friday. The acts were recorded in four videos that were made public this week and show prisoners being physically and sexually assaulted, humiliated and verbally abused by prison officers. "We condemn the acts of torture and ill-treatment perpetrated against inmates at a prison and a juvenile detention facility in Georgia," Colville said. He said the victims must have access to medical and psychological support. The videos led to arrests inside and outside of Georgia. They also stoked outrage. Georgia's interior minister resigned two days after the videos were broadcast. Torture is absolutely prohibited under human rights law, Colville said in Geneva, and Georgia has ratified the United Nations Convention Against Torture. He praised the condemnation of the videos by Georgia's president and urged the government to stand by its promise to investigate all alleged human rights abuses, not just the ones exposed this week.