His daughter, son-in-law, and grandchildren were civilians.
Intentionally targeting civilians is a war crime.
Even if they were not targeted directly, an attack is illegal if:
it fails to minimize civilian harm, or
the civilian casualties are disproportionate to the military advantage
The entire attack was illegal under international law: https://law.stanford.edu/2026/03/03/stanfords-allen-weiner-o...
https://www.newser.com/story/384710/legality-of-khameneis-ki...
His daughter, son-in-law, and grandchildren were civilians. Intentionally targeting civilians is a war crime. Even if they were not targeted directly, an attack is illegal if: it fails to minimize civilian harm, or the civilian casualties are disproportionate to the military advantage
International law is very clear on this point.