A Ukrainian pilot was killed and his F-16 fighter jet crashed as after Russia launched a huge aerial assault involving hundreds of drones and scores of missiles overnight, the Ukrainian military said on Sunday.

KYIV, Ukraine (AP) — Russia launched its biggest aerial attack against Ukraine overnight, a Ukrainian official said Sunday, part of an escalating bombing campaign that has further dashed hopes for a breakthrough in efforts to end the 3-year-old war.

A Ukrainian F-16 pilot was killed intercepting Russian aerial attacks overnight, Kyiv's air force said, in what a Ukrainian official described as the largest-scale air attacks on his country since the start of the war.