The Ukrainian drone attack on Russian air bases, carried out as part of operation “Spiderweb,” left the Kremlin “angry and alarmed” over the unexpected vulnerability of its air fleet far from the front lines,

Russia’s Defense Ministry in a statement confirmed the attacks, saying they damaged aircraft and sparked fires on air bases in the Irkutsk region, as well as the Murmansk region in the north. It said strikes were also repelled in the Amur region in Russia’s Far East and in the western regions of Ivanovo and Ryazan, the ministry said.

A surprise Ukrainian drone attack that targeted several Russian air bases hosting nuclear-capable strategic bombers was unprecedented in its scope and sophistication for the first time reached as far as Siberia in a heavy blow to the Russian military.