Separately, a major ethnic armed group fighting the government in Rakhine state said 20 civilians had been killed in strikes by the military so far this month. Myanmar’s military government did not immediately respond to either the U.N. probe or the allegations by the Arakan Army. In the past, the military has said it only attacks legitimate targets of war, accusing the resistance forces of being terrorists. The report by the United Nations-established Independent Investigative Mechanism for Myanmar, or IIMM, details a yearlong investigation into alleged war crimes and crimes against humanity committed by Myanmar’s military and affiliated militias, as well as the opposition armed groups. The IIMM said the Myanmar military was increasingly using motorized paragliders — also known as paramotors — as well as gyrocopters and drones to carry out low-altitude airstrikes with unguided explosives.