From the above PBS article:
The Israeli military also confirmed it struck roads around Iran’s Fordo enrichment facility to obstruct access to the site.
They took out the roads to prevent emergency responders from trying to help people who may have been trapped or dying in the rubble. This is reprehensible, and likely a war crime. Attacking the survivors of a bombing is distinctly different than the bombing of the infrastructure itself.
But the site was obliterated, according to Trump. Shouldn't have BEEN survivors. And if Israel just wanted to kill anyone who tried to assess damage just because they can... yeah, that's a war crime.