Russia has launched overnight attacks on four Ukrainian cities, injuring at least 15 people and targeting energy infrastructure.

Russia attacked cities across Ukraine with hundreds of drones and a missile strike, hitting energy infrastructure and wounding at least 15 people.

Drones that kill other drones. These machines swarm the skies in vast numbers. They're cheap, they're deadly and they're among the main reasons Ukraine believes it can hold out against advancing Russian forces this year and even beyond,