GUR drones attack refineries and military airfields in Russia more than 1,800 km from the border.

On July 27, Russian military airfields in the city of Engels, Saratov region; the Diaghilev military airfield in the Ryazan region; and the Olenya military airfield in the Murmansk region were attacked by drones launched by the Defense Intelligence of Ukraine (GUR). In addition, an oil refinery…