Sources

https://abcnews.go.com/International/ukraine-loses-16-fighter-amid-massed-russian-drone/story?id=123315001
https://militarywatchmagazine.com/article/ukrainian-f16s-lost-large-scale-russian-air-missile-attack
https://kyivindependent.com/f-16-pilot-killed-during-russias-overnight-massive-missile-and-drone-strike-air-force-says/