Severely injured Russian soldiers are being returned to the frontline in Ukraine without the approval of military doctors, independent Russian news outlet Agentstvo reported on Thursday.In one instance, two Russian soldiers with punctured lungs were sent into combat, instead of to a military medical commission for examination, Valentina Melnikova, executive secretary of the Union of the Committees of Soldiers' Mothers of Russia, said, per Agentstvo.There are "an unacceptable number" of documented cases of commanders sidestepping military doctors and instead sending wounded soldiers straight from the hospital to the frontline, Melnikova told Agentstvo, per a Meduza translation.The presidential Human Rights Council in Russia is investigating the matter after receiving complaints from hospital staff in Moscow and in the Russian-occupied city of Donetsk in Ukraine, council member Olga Demicheva told the state-run RIA Novosti news agency on Tuesday.In November, Army Gen. Mark Milley, the highest-ranking US military officer, estimated that "well over" 100,000 Russian soldiers had been killed or wounded in the war in Ukraine, according to The Washington Post."