KYIV and LONDON -- The Security Service of Ukraine (SBU) conducted a large-scale operation targeting four Russian military airfields on Sunday, an SBU source confirmed to ABC News, claiming to have hit more than 40 military aircraft "that bomb Ukrainian cities every night."

The governors of the Russian regions of Irkutsk and Murmansk confirmed drone attacks in their respective regions. Videos shared with ABC News by the SBU showed drones attacking Olenya airbase in Murmansk and Belaya airfield in Irkutsk. Both are home to Russian strategic bomber aircraft, including nuclear-capable bombers.

The governor of Irkutsk noted that the drones were launched from the back of a truck in the area. The governor posted an accompanying video of drones flying overhead and huge columns of smoke rising

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