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.

A Ukrainian F-16 fighter pilot died in a crash while repelling a Russian air attack that involved hundreds of drones, cruise and ballistic missiles, authorities said on Sunday, as Moscow intensifies night-time air barrages in the fourth year of war.

Ukraine’s air force says the assault involved 537 aerial weapons including drones and missiles, of which 249 were intercepted and 226 were likely jammed.