Overnight, drones struck Russia’s Slavyansk-on-Kuban, with reports indicating that an oil refinery was targeted. In 2025, the facility processed around 5.2 million tons of crude oil and condensate annually and was involved in supplying Russian occupying forces.

An oil refinery in Russia’s Saratov region was also attacked overnight. The facility had been targeted before on December 13. Local residents said they heard at least 10 strong explosions in Saratov as well as in the nearby city of Engels.