Ukraine said on Monday that Russia had fired dozens of drones and missiles at the country, killing seven in Kyiv.A flurry of diplomatic efforts to end the three-year war have stalled, with the last direct meeting between Kyiv and Moscow almost three weeks ago and no follow-up talks scheduled.

The overnight attack was one of the largest on Ukraine and included strikes in the western part of the country, which is hit less often.

Russia flattened a section of an apartment block in Kyiv on Tuesday in its deadliest attack on the Ukrainian capital this year — part of a barrage of hundreds of drones and dozens of missiles that killed at least 18 people and wounded 151 others.