Kyiv mayor visits air strike site, meets residents

STORY: The air strikes and shelling killed at least four people, authorities said, as invading forces tightened their grip on the Ukrainian capital.

Two large blasts echoed across the centre of the city just before dawn on Tuesday. Late on Monday, tracer bullets flashed across the night sky as Ukrainian forces apparently targeted an enemy drone.

Video footage released by the mayor's office showed the high-rise apartment block in flames after being struck. Firefighters tried to douse the blaze and rescue workers helped evacuate residents trapped inside using mobile ladders.

Russia calls its actions in Ukraine a "special military operation".