Ukrainian officials reported Russian attacks on critical infrastructure in the west of Ukraine, bordering Poland.

The air force said 436 drones and 38 missiles were downed by air defenses, with the help of U.S.-made F-16 fighter jets whose pilots shot down "dozens" of attack drones. "The work of Ukrainian fighters is extremely dangerous," it said.

Russia launched hundreds of drones and missiles at Ukraine overnight Sunday, in what Kyiv is calling Russia’s largest aerial assault since its full-scale invasion. The attacks killed at least four civilians and targeted regions far from the frontlines,