Drones targeted multiple regions in Russia, with authorities reporting damage to various facilities. (UPDATED)

This was reported by the President of the Republic of Tatarstan Rustam Minnikhanov, the Governor of the Tula Region Dmitry Milyaev, and the Head of the Saratov Region Roman Busarhin.

Busarhin did not specify which particular facility in Engels sustained damage. He added that emergency and operational services are currently on the scene.

Updated at 11:15. The 14th Separate Drone Battalion of the UAV Forces announced that their operators, in coordination with other Defense Forces units, successfully struck the infrastructure of the military airfield "Engels-2," where the Tu-95MS and Tu-160 bombers of the 22nd Heavy Bomber Aviation Division are stationed.

As a result of the strike, a fire broke out again at the "Kristall" oil base involving tanks filled with rare aviation fuel for the Tu-160 bombers, which Russia uses in its war against Ukraine.

"We are doing everything possible to ensure that the firefighting teams in 'Engels,' who have just extinguished the flames from the previous strike, remain busy in the face of the difficult economic situation in Russia," stated the battalion.

The head of the Engels District, Mikhail Isaev, reported that classes in schools will be conducted remotely due to the threat of drone attacks.

Updated at 08:27. Russian Telegram channels report that drones have attacked Kazan. According to their information, local residents are reporting a fire in the area of the "Kazan Orgsintez" plant. The regional head, Rustam Minnikhanov, also confirmed the attack.

A massive drone attack was also reported in the Tula region of Russia. The regional governor stated that information regarding the consequences of the attack is still being verified.

Additionally, it is known that Russian aviation has imposed temporary restrictions at airports in Nizhnekamsk, Penza, Ulyanovsk, Kazan, and Saratov.

Furthermore, it should be noted that on the night of January 8, drones struck the fuel storage base "Kombinat Kristall" in Engels, Saratov region, Russia. This facility supplied fuel to the military airfield "Engels-2," where Russia's strategic aviation is based.

When reporting on the attack, the Governor of the Saratov region also referred to the oil base as an "industrial enterprise."

The fire was eventually extinguished five days after the drone attack.