A key oil facility erupted into flames this morning following a suspected drone strike by Ukraine inside Russia. The attack hit a depot in Russia 's Yartsevo district of the Smolensk region, which caught fire overnight on December 31, Russian authorities said.

Russia launched an aerial attack on Ukraine, striking the capital and other regions with multiple missiles and drones.

Flurry of attacks on Kyiv and elsewhere comes as Ukraine says it shot down a Russian Mi-8 helicopter for the first time.

Early indications suggest a Russian anti-aircraft system may have downed the passenger jet that crashed in Kazakhstan, a US official told CNN, as authorities recovered a second black box that they hope will shed light on the cause of the disaster that killed dozens of people.

Russia has launched several large-scale attacks on Ukraine this month, firing hundreds of missiles and drones at its neighbor.

Russia launched more than 40 attack drones across the Azov Sea into eastern and central Ukraine overnight, damaging houses in Kharkiv and Odessa, the Ukrainian military said.

Ukraine shot down 21 Russian attack drones overnight, the Ukrainian Air Force reported on Dec. 30. According to the report, Russia launched a total of 43 drones from its Krasnodar Krai region. The Air Force said it also lost track of the 22 decoy drones that Russia launched alongside the attack ones.