Overnight Ukrainian drone strikes targeted major energy and petrochemical facilities in central Russia’s Samara region and the republic of Tatarstan, monitoring groups reported Friday.

An oil refinery in the Russian city of Samara was struck by Ukrainian drones overnight on June 10, social media channels reported.

The strike targeted the VNIIR-Progress plant in Cheboksary, a key supplier of Kometa antennas used to shield Russian drones from Ukrainian electronic warfare systems.