A Ukrainian tank during firing practice process at special shooting range near the frontline in Zaporizhzhia, Ukraine on March 29, 2023.Muhammed Enes Yildirim/Anadolu Agency via Getty Images Ukrainian civilians imprisoned by Russia are being forced to dig mass graves, the AP reported. They're also being forced into livestock trailers in the occupied territory of Zaporizhzhia, per AP. Ukrainian President Volodymyr Zelenskyy has slammed NATO for not allowing it into the alliance, saying that "for Russia, this means motivation to continue its terror." Ukrainian civilians who are being held prisoner in Russian-occupied territories are being forced to dig mass graves for their fellow prisoners, The Associated Press reported.In the Ukrainian city of Zaporizhzhia, which is located on the frontlines of Russia's military invasion, Ukrainian civilians also have to share one toilet and were forced into a livestock trailer while being held at gunpoint, the report said.It went on to say that in one instance, a civilian who refused to dig trenches and graves on Russian officials' orders was immediately shot and that his body was placed in one of the graves.The AP reported that as Russia continues its offensive against Ukraine, it's planning to hold possibly thousands more Ukrainians as prisoners across occupied Ukrainian territories and wants to build as many as 25 additional prisoner colonies by 2026.The news comes as Ukrainian President Volodymyr Zelenskyy makes an aggressive push for Ukraine to be admitted to NATO."It seems there is no readiness neither to invite Ukraine to NATO nor to make it a member of the Alliance," he tweeted.