The City council in Mariupol, which has been one of the hardest-hit areas since Russia invaded Ukraine at the end of February, claimed that Russian troops have been utilizing mobile crematoriums to hide civilian casualties. “Killers cover their tracks. Russian mobile crematoriums have started operating in Mariupol,” Mariupol city council reported on Wednesday via Telegram. “They collect and burn the bodies of Mariupol residents murdered and killed as a result of the Russian invasion,” they added, warning that last week’s estimate of 5,000 deaths could balloon up to “tens of thousands.” Mariupo…