 Ukrainian-made reconnaissance unmanned aerial vehicle Lelika-100 gathers intelligence data to guide artillery in targeting Russian military hardware on the Bakhmut frontlines. Lelika-100 UAV, which is Ukrainian four-storey, is capable to fly behind enemy lines of defense to detect clusters of equipment, infantry, providing essential information for adjusting artillery fire. If an interesting target is spotted, the information is passed to artillery command outpost, according to the unit operating the UAV. Giving an early update on Monday from around the frontlines, the Ukrainian military said its troops have so far retaken 169 square kilometers on the southern front and 24 square kilometers around the eastern city of Bakhmut since its counter-offensive began last month. Russian accounts said heavy fighting gripped areas outside Bakhmut, the city captured by Russian mercenary Wagner forces in May after a month's long siege.