Ukrainian drones killed at least 10 people in attacks against targets across Russia and Russian-occupied areas of Ukraine, including a warehouse owned by online retailer Ozon and an industrial facility, Russian officials said on Saturday. Russia and Ukraine are both ramping up drone campaigns ‌aiming to cripple each other’s economic infrastructure, often striking targets far beyond the war’s front lines, as fighting on the battlefield grinds towards the four-and-a-half-year mark.