Update(1645): Ukraine's President Zelensky is spiking the football, and poking the Russian bear (or rather jabbing it pretty hard), as he issued a statement calling Sunday's massive drone attack on Russian territory which destroyed strategic bombers "an absolutely brilliant result". 

He described that the attack happened "One year, six months, and nine days from the start of planning to effective execution. Our most long-range operation." The Ukrainians are calling it 'Operation Spider's Web'.

Indeed there are reports of the operation's reach going very far north...

Russia's military has since issued official statement confirming the scope of the massive drone swarm strikes:

Military airfields across Russia have been attacked in a series of kamikaze drone strikes, the country's Defense Ministry reported on Sunday, blaming the incidents on Kiev. Most of the strikes were successfully repelled, with some resulting in material damage, it added.

Airfields were targeted in the Murmansk Region in the country's north, in Ivanovo and Ryazan regions in central Russia as well as in Irkutsk Region in Siberia and Amur Region in the Far East, the ministry said. All the attacks employed first-person view (PFV) kamikaze drones, with some of them being launched from territories in close proximity to the airfields, it stated.

Some of the culprits behind the attacks have been detained, the ministry said, without revealing the number of those arrested or their identities. The Russian military also said that the "Kiev regime" was ultimately responsible for the strikes, which they described as "terrorist attacks."

Meanwhile, Washington still feigning ignorance of planning stage of attack...

Update (1240ET):

On Sunday, the Russian Ministry of Defense issued an official statement that a coordinated Ukrainian drone swarm attack targeted and damaged military aircraft across several airbases located deep within Russian territory.

Affected airfields reportedly include:

Murmansk Oblast

Irkutsk Oblast

Ivanovo Oblast

Ryazan Oblast

Amur Oblast