Russia sent hundreds of drones toward Ukraine overnight into Wednesday, with four key regions coming under heavy attack and President Volodymyr Zelensky’s hometown facing “massive” bombardment, officials said.

"Putin's criminal war is getting closer to our borders," Polish Foreign Minister, Radosław Sikorski, said on Wednesday.

Russia pounded Ukraine with hundreds of drones and missiles overnight and Saturday as part of a stepped-up bombing campaign that killed at least six people and wounded dozens, officials said.

Russia launched its largest drone and missile bombardment of Ukraine overnight into Wednesday, according to Ukrainian President Volodymyr Zelenskyy.

Ukraine's military said it eliminated hundreds of Russian drones overnight after Moscow launched a massive aerial attack targeting the northwestern city of Lutsk.