ITV says (yesterday) that
Call me a Russian stooge if you will, but - Russia holds the plant, the surrounding grounds and the nearby town (Energodar). And it's not like the front line is right near the plant, so that a Russian shell targeting Ukranian forces is statistically likely to land on the NPP grounds, right?
So, what kind of argument can be made for any party other than Ukraine being responsible for shelling the plant?
I suppose theoretically there could be an accusation of a false-flag operation, but I don't know that such a claim has been made.