Having already reshaped the battlefield by doing work once reserved for long-range missiles, field artillery and human intelligence, drones are now fighting Russian drones - a boon for Ukraine's dwindling stock of air defence missile systems.

Ukraine’s Security Service said its drones destroyed one jet and damaged four at Saki military airfield overnight, aiming to weaken Russia’s war capability in the occupied Crimea and on the Black Sea.

Drones operated by Ukraine's Security Service (SBU) struck five Russian fighter jets overnight on Aug. 4 at an airfield in Saky, a city in Russian-occupied Crimea, the agency said. Ukrainian drones, in a Special Operations Center "A" mission, destroyed a Su-30SM aircraft, damaged another, hit three Su-24s, and struck an aviation weapons depot.