drone attack on Russian soil in the 18 months of fighting in Ukraine.
Drones hit an airport in the western Pskov region and were shot down over the regions of Oryol, Bryansk, Ryazan and Kaluga.
The strike in Pskov started a massive fire and four Il-78 transport aircraft were damaged, Russia's state news agency Tass reported, citing emergency officials.
Pskov regional Gov. Mikhail Vedernikov ordered all flights to and from the Pskov airport canceled Wednesday, citing the need to assess the damage during daylight.
Footage and images posted on social media overnight showed smoke billowing over the city of Pskov, and a large blaze.