Russia has been bombarded in the biggest Ukrainian drone attack of the war, Moscow officials have said, on the same day as crunch talks are set to be held between Kyiv and the United States.

The Russian Defence Ministry said air defences shot down 337 Ukrainian drones over 10 Russian regions overnight, a record high, as Ukraine hit back at a series of brutal recent attacks launched by Moscow.

At least one Russian civilian has been killed and several injured, with dramatic footage showing fires raging from the exploding drones including in high rise residential buildings near Moscow.