Drones struck Russian Main Intelligence Directorate (GRU) military base in Moskovskoe village in Stavropol Krai, injuring one intelligence officer, Russian Telegram channel Astra reported, citing sources, on July 4.
33443rd GRU special operations unit (Osnaz) came under attack.
One drone exploded in the attack, though the extent of damage to the military facility remains unknown.
Two drones crashed in Moskovskoe village in the morning on July 4, Stavropol Governor Vladimir Vladimirov claimed.
No infrastructure damage was caused, "all systems are operating normally".
Russia's Ministry of Defense, following its usual protocol, reported the "destruction" of Ukrainian drones.
Two drones were allegedly shot down over Bryansk Oblast, one over Belgorod Oblast, and another in Tambov Oblast.