The presidents of Ukraine and Russia "have not been exactly best friends," U.S. President Donald Trump said earlier this week, as he pushed for an in-person meeting.

Russia launched 614 air attack munitions into Ukraine overnight into Thursday, the air force in Kyiv said, in a "massive combined air strike" on targets in the country.

Amid international peace efforts, Moscow launched 574 strike drones and 40 missiles against Ukraine on Wednesday night.

President Volodymyr Zelenskyy says a Russian cruise missile hit a U.S. electronics plant in the far west of Ukraine. The strike was part of an overnight barrage of more than 600 drones and missiles.