Russia and Ukraine continued to exchange long-range drone and missile strikes on the eve of the summit. Ukraine’s military said on Friday morning that it had hit several targets inside Russia, including an oil refinery and a port that Moscow uses to import military supplies from Iran.

Ukraine has been striking Russia’s oil industry daily in August. Ukrainian long-range drones are hitting refineries and hydrocarbon distribution centers hundreds of miles from the border.

Ukrainian drones targeted the Unecha oil pumping station, part of the Transneft Druzhba pipeline network, sparking a large fire, an intelligence source told the Kyiv Independent.