Ukraine is repeatedly targeting Russia’s oil infrastructure, the lucrative engine of the Kremlin’s war economy, to ramp up financial pressure on Moscow to make peace by imposing a substantial cost to its invasion, which began in February 2022.

Nine people were hospitalized, including a pregnant woman, after a series of powerful explosions sounded in the city and airs defenses were activated.

Russia is now using fiber-optic drones with a 50-kilometer reach, a senior Ukrainian official told Business Insider.