Russia appears to be using drone attacks on civilians to train young pilots, says a Ukrainian lawmaker with ties to Ukraine's military. One city has been hit by hundreds of drone strikes this year.

A fire erupted in the city of Kazan in Russia's Tatarstan republic overnight on Jan. 20 amid a Ukrainian drone attack on the city, Russian Telegram channels reported.

Ukraine struck Russian regions with a major drone and missile attack overnight, damaging at least two factories and forcing schools to close in a major southern Russian city, according to Russian officials and media.

Ukrainian officials say Russia is using drones to target civilians in Kherson. Some Russian soldiers appear to be bragging about the deadly attacks on social media.

A drone attack by Ukraine has set an oil depot in Russia's Smolensk region on fire, in the latest in a series of strikes targeting Russian energy infrastructure in recent weeks