Ukraine attacked two Russian refineries and other key oil targets overnight into Saturday, officials said, just hours after the United States granted Moscow another waiver on the sale of its sanctioned oil.

According to agency reports, Kyiv’s ‌drone forces commander Robert “Madyar” Brovdi said on Telegram that Ukraine had struck the Novokuybyshevsk and Syzran oil refineries in Russia’s Samara region, the Tikhoretsk oil terminal in the Krasnodar region, and the Baltic Sea port of Vysotsk, as well as an oil depot in Sevastopol, in occupied Crimea.

The Russian Ministry of Defense did not acknowledge the strikes, announcing only that the country’s air defenses intercepted 258 Ukrainian drones overnight.

However, Russian regional authorities reported the attacks, or their consequences. Vyacheslav Fedorishchev, the governor of the Samara region, said “strikes have been recorded” against what he called “industrial facilities” and that emergency services were on the scene.

The Krasnodar region Emergency Response Headquarters said a fire had broken out at the oil depot in Tikhoretsk, and that “224 personnel and 56 pieces of equipment” were involved in trying to bring it under control.

Aleksandr Drozdenko, the governor of the Leningrad region where the Vysotsk port is located, said on Saturday morning that a drone attack had caused a fire at the port, which he said had since been extinguished.