Ukrainian and Russian officials blamed each other on Saturday for the deaths of dozens of Ukrainian prisoners of war in an attack on a prison in separatist-held territory. The International Red Cross has asked to visit the prison to make sure dozens of injured prisoners are being treated properly, but said its request has so far not been granted. Meanwhile, Russia continued to launch attacks in several Ukrainian cities, hitting a school and a bus station. Ukrainian President Volodymyr Zelenskyy said the ICRC and the United Nations have a duty to respond to the bombing of the prison complex in Ukraine’s eastern Donetsk province and called for Russia to be re-designated a terrorist state. “Condemnation at the level of political rhetoric is not enough for this mass murder,” he said. Separatist authorities and Russian officials said Friday’s attack killed 53 Ukrainian prisoners and wounded 75 others. Russia’s Defense Ministry on Saturday released a list of the names of 48 Ukrainian fighters, aged 20 to 62, who died in the attack . it was unclear whether the ministry had revised its death toll. Satellite photos taken before and after the attack show that a small, square building in the middle of the Olenivka prison complex was demolished, its roof in pieces. Both Ukraine and Russia claimed the prison attack was premeditated and intended to silence Ukrainian prisoners and destroy evidence. The ICRC, which has organized civilian evacuations and worked to monitor the treatment of prisoners held by Russia and Ukraine, said it had requested access to the prison “to determine the health and condition of all the people who were on site at the time of the attack. .” “Our priority at this time is to ensure that the injured receive life-saving treatment and that the bodies of those who have lost their lives are treated with dignity,” the Red Cross said. However, the group said late Saturday that its request for access to the prison had not yet been granted. “Granting ICRC access to prisoners is an obligation of parties to conflict under the Geneva Conventions,” the ICRC said on Twitter. Russia claimed that Ukraine’s military used precision rocket launchers supplied by the US to target the prison in Olenivka, a settlement controlled by the Moscow-backed Donetsk People’s Republic. The Ukrainian military accused the Russians of bombing the prison to cover up the alleged torture and execution of Ukrainians there. The Institute for the Study of War, a Washington-based think tank, said competing claims and limited information prevented it from assigning full responsibility for the attack, but “available visual evidence appears to support the Ukrainian claim more than Russian”. Moscow has launched an investigation into the attack and the UN has also said it is ready to send investigators. Deputy UN spokesman Farhan Haq said “we are ready to send a team of experts capable of conducting an investigation, requiring the consent of the parties, and we fully support the initiatives” of the Red Cross. Elsewhere in eastern Ukraine, Russian missiles hit a school in Kharkiv and a bus station in Sloviansk, among other attacks. In southern Ukraine, one person was killed and six were wounded in shelling of a residential area in Mykolaiv, local officials said. Russian and separatist forces are trying to take full control of the Donetsk region, one of two eastern provinces that Russia has recognized as sovereign states. Deputy Prime Minister Iryna Vereshchuk warned on Saturday that Ukrainian-controlled areas of Donetsk will face serious heating problems this winter due to the destruction of the natural gas network. He called for the mandatory evacuation of residents before the cold weather sets in. The attack on the prison reportedly killed Ukrainian soldiers captured in May after the fall of Mariupol, a Black Sea port city where troops and the Azov National Guard Regiment faced a months-long Russian siege. On Saturday, an association of relatives of Azov fighters dressed in black demonstrated outside Kyiv’s Hagia Sophia Cathedral and called for Russia to be designated a terrorist state for violating Geneva Convention rules on the treatment of prisoners of war. A woman with dark glasses who gave only her first name, Iryna, was waiting for news about her 23-year-old son. “I don’t know how he is, where he is, if he’s alive or not. I don’t know. It’s horror, just horror,” she said. On the energy front, Russia’s state-owned natural gas company said on Saturday it had halted shipments to Latvia due to contract violations. Gas giant Gazprom said shipments were halted because Latvia violated “conditions for gas extraction.” The statement likely referred to a refusal to meet Russia’s demand for gas payments in rubles rather than other currencies. Gazprom had previously suspended gas shipments to other EU countries, including the Netherlands, Poland and Bulgaria, because they would not pay in rubles. EU states are scrambling to secure other sources of energy, fearing Russia will cut off more gas supplies as winter approaches.