> Carpet bombing of cities, towns, villages or other areas containing a concentration of protected civilians has been considered a war crime since 1977, through Article 51 of Additional Protocol I of the Geneva Conventions.

https://en.wikipedia.org/wiki/Carpet_bombing

Autonomous weapons have hardly been deployed yet, maybe at the Inner Korean border or some lunatic's backyard. Therefore I don't think there is any legislation for it yet. But it seems a very cruel way of killing, also considering in this particular case they didn't even send footage back. What kind of experiment was this? Maybe they didn't like to see the brutality, perhaps people begging for mercy not to be killed, giving up and showing a white flag. Indeed this isn't possible with carpet-bombing.

I can kill you by having a B-52 level the entire downtown area where you work.

Or, I can have a drone with an LPR slam a mortar round into your car as you drive.

Because the targeting in that case was done by a human.