 A Ukrainian air defense unit operated a Swedish-made RBS-70 portable system on June 27 position to defend against Russian strikes on Kiev region. The RBS-70 system is most effective against unmanned aerial vehicles, helicopters and jets soldiers in the unit said. These systems have already shot down unmanned aerial vehicles. It is quite effective against those targets, said Dmitro, air defense battery commander. Russia has unleashed regular long-distance missile and drone attacks since October, but it seriously increased strikes since May as Ukraine prepared for a counter-offensive this month. In the month of May alone, Ukraine's Air Force reported shooting down 149 cruise missiles, 399 drones, seven hypersonic kinsle missiles, three ballistic missiles, as well as 11 Iskander missiles of two different types.