The training unit is located to the rear of the 1,000-kilometer (620-mile) active front line, where Russian reconnaissance and strike drones are able to strike.
Ukraine’s forces suffer from manpower shortages and take extra precautions to avoid mass gatherings as the skies across the front line are saturated with Russian drones looking for targets.
“If it is established that the actions or inaction of officials led to the death or injury of servicemen, those responsible will be held strictly accountable,” the Ukrainian Ground Forces’ statement said.
Meanwhile, Ukrainian drone strikes were reported deep in Russian territory Sunday, including in the Siberian region of Irkutsk, more than 4,500 kilometers (2,800 miles) east of Moscow.