Russia and Ukraine exchanged large drone attacks on Sunday night into Monday, with alleged Ukrainian UAVs forcing flight restrictions at three Russian airports.

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.

Russian forces launched overnight drone attacks on several Ukrainian regions using Shahed-type drones, Ukraine’s Air Force reported.

Russia's military on Tuesday said it would retaliate against Ukraine after Kyiv attacked Russian regions by firing six U.S.-made ATACMS ballistic missiles, six UK-made Storm Shadow cruise missiles and launching one of the biggest drone attacks to date.

A Russian missile strike on the Ukrainian capital killed three people on Saturday, Ukrainian leaders said, branding it a "heinous" attack, while Moscow described it as "retaliation".

Air defences were engaged in Ukraine's capital of Kyiv on Thursday to repel a Russian drone attack, officials said, and Reuters witness reported explosions in the city while British Prime Minister Keir Starmer was visiting.

The Russians attacked Ukraine using a new version of the popular Shahed-136 drones. According to the Defense Express portal, this marks the fourth known variant of Iranian drones employed by the Russian Federation's army.

Russian forces launched around 550 attack drones, nearly 60 missiles of various types, and more than 660 aerial bombs against Ukraine during the past week, President Volodymyr Zelensky said in his evening address on Jan.