Hundreds of Russian drones flying from all directions attacked Kyiv overnight into Thursday in an apparent new Russian tactic, marking a second consecutive night of ferocious attacks on Ukraine.

At least two people were killed, including a 22-year-old police officer who was named by authorities as Maria Dziumaha, and more than a dozen were wounded in the attacks, according to authorities.

CNN staff on the ground in Kyiv witnessed massive, fiery explosions that illuminated the night sky. Smoke filled the air, creating a burning smell and obscuring the visibility in the city center.

Russia has been intensifying its aerial attacks against Ukraine in recent weeks, but the assault on Thursday appeared to mark a change in approach from Moscow.

Russia launched 400 drones and 18 missiles, including eight ballistic and six cruise missiles, according to a telegram post from Ukrainian President Volodymyr Zelensky.