On 19 May, drones targeted an oil depot and an airfield in Russia's Krasnodar Krai and explosions occurred in occupied Crimea. Meanwhile, a fire broke out at Russia's Saint Petersburg oil depot, with local officials denying it resulted from a drone attack.
In the early hours of 31 January, a drone hit an oil refinery in St. Petersburg, Russia’s second-largest city and the Baltic Sea port, in a reported Ukrainian intelligence-orchestrated attack.